| 301 | 907 | Jan 2015 | Filoli | State | San Mateo | |
| 302 | 985.3 | Jan 2015 | Camp Coxcomb | Other | Riverside | |
| 303 | 985.4 | Jan 2015 | Camp Iron Mountain | Other | San Bernadino | |
| 304 | 727 | Jan 2015 | Portolá Expedition | Other | Ventura | |
| 305 | 160 | Jan 2015 | Plummer House, Oldest House in Hollywood | Other | Los Angeles | |
| 306 | 996 | Jan 2015 | Union Oil Company | Other | Ventura | |
| 307 | 756 | Jan 2015 | Sycamore Tree | Missing | Ventura | |
| 308 | 624 | Jan 2015 | Warring Park | Other | Ventura | |
| 309 | 553 | Jan 2015 | Rancho Camulos | Other | Ventura | |
| 310 | 141 | Jan 2015 | Hangman's Tree | None | El Dorado | |
| 311 | 503 | Jan 2015 | First County Courthouse Site | State | Alameda | |
| 312 | 246 | Jan 2015 | Rancho San Antonio (Peralta Grant) | State | Alameda | |
| 313 | 768 | Jan 2015 | Beet Sugar Factory Site | State | Alameda | |
| 314 | 642 | Jan 2015 | Leland Stanford Winery | State | Alameda | |
| 315 | 279 | Jan 2015 | Estudillo Home | State | Alameda | |
| 316 | 776 | Jan 2015 | Castro Valley Public School Site | State | Alameda | |
| 317 | 824 | Jan 2015 | San Leandro Oyster Beds | Missing | Alameda | |
| 318 | 46 | Jan 2015 | Vallejo Flour Mill | State | Alameda | |
| 319 | 849 | Jan 2015 | Mills Hall | None | Alameda | |
| 320 | 107 | Jan 2015 | Joaquin Miller Home | Other | Alameda | |
| 321 | 285 | Jan 2015 | Peralta (Ygnacio) House | State | Alameda | |
| 322 | 970 | Jan 2015 | Rainbow Trout Species Identified | State | Alameda | |
| 323 | 694 | Jan 2015 | Church of St. James the Apostle | State | Alameda | |
| 324 | 925 | Jan 2015 | Peralta (Antonio) Hacienda | Other | Alameda | |
| 325 | 962 | Jan 2015 | Blossom Rock Navigation Trees | State | Alameda | |
| 326 | 968 | Jan 2015 | China Clipper Flight Departure Site | State | Alameda | |
| 327 | 1029 | Jan 2015 | USS Hornet | None | Alameda | |
| 328 | 1036 | Jan 2015 | Coast Guard Lightship WLV 605 - Relief | None | Alameda | |
| 329 | 954 | Jan 2015 | Croll Building | None | Alameda | |
| 330 | 440 | Jan 2015 | Alameda Terminal of Transcontinental Railroad | State | Alameda | |
| 331 | 955 | Jan 2015 | Southern Pacific Depot: Menlo Park | State | San Mateo | |
| 332 | 976 | Jan 2015 | Birthplace Of Silicon Valley | State | Santa Clara | |
| 333 | 969 | Jan 2015 | Wallis Home Site | State | Santa Clara | |
| 334 | 939.8 | Jan 2015 | Capidro | None | San Mateo | |
| 335 | 524 | Jan 2015 | Juana Briones De Miranda Site | State | Santa Clara | |
| 336 | 857 | Jan 2015 | Squire House | State | Santa Clara | |
| 337 | 2 | Jan 2015 | Portolá Journey's End | State | San Mateo | |
| 338 | 895 | Jan 2015 | Hostess House | State | Santa Clara | |
| 339 | 1000 | Jan 2015 | Integrated Circuit Invention Site | State | Santa Clara | |
| 340 | 836 | Jan 2015 | Pioneer Electronics Research Laboratory | State | Santa Clara | |
| 341 | 834 | Jan 2015 | Muybridge and the Development of Motion Pictures Site | State | Santa Clara | |
| 342 | 913 | Jan 2015 | Lou Henry Hoover House | State | Santa Clara | |
| 343 | 508 | Jan 2015 | Tehachapi Loop | Other | Kern | |
| 344 | 643 | Jan 2015 | Tehachapi Old Town | State | Kern | |
| 345 | 660 | Jan 2015 | Jedediah Smith Trail | Missing | Kern | |
| 346 | 97 | Jan 2015 | Oak Creek Pass | State | Kern | |
| 347 | 741 | Jan 2015 | Bealville | Other | Kern | |
| 348 | 130 | Jan 2015 | Willow Springs | Other | Kern | |
| 349 | 658 | Jan 2015 | Western Hotel | State | Los Angeles | |
| 350 | 757 | Jan 2015 | Caliente | Other | Kern | |
| 351 | 374 | Jan 2015 | Tulamniu Indian Site | Other | Kern | |
| 352 | 588 | Jan 2015 | Kern River Slough Station | Other | Kern | |
| 353 | 485 | Jan 2015 | Lakeview Gusher 1 | Other | Kern | |
| 354 | 371 | Jan 2015 | Garcés Visit in 1776 | Other | Kern | |
| 355 | 291 | Jan 2015 | Fages-Zalvidea Crossing | State | Kern | |
| 356 | 540 | Jan 2015 | Sinks of the Tejón | State | Kern | |
| 357 | 923 | Feb 2015 | Flight of the Gossamer Condor | State | Kern | |
| 358 | 1022 | Feb 2015 | Shafter Cotton Research Station | State | Kern | |
| 359 | 389 | Feb 2015 | Kaweah Post Office | State | Tulare | |
| 360 | 410 | Feb 2015 | Charter Oak or Election Tree | Other | Tulare | |
| 361 | 413 | Feb 2015 | Tailholt | State | Tulare | |
| 362 | 631 | Feb 2015 | Garcés Baptismal Site | Missing | Kern | |
| 363 | 648 | Feb 2015 | Fountain Springs | State | Tulare | |
| 364 | 473 | Feb 2015 | Tule River Stage Station | State | Tulare | |
| 365 | 672 | Feb 2015 | Lavers Crossing | Other | Kern | |
| 366 | 471 | Feb 2015 | Butterfield Stage Route | State | Tulare | |
| 367 | 388 | Feb 2015 | Tule River Indian Reservation | State | Tulare | |
| 368 | 495 | Feb 2015 | Glennville Adobe | State | Kern | |
| 369 | 818 | Feb 2015 | First Military Flying School In America | State | San Diego | |
| 370 | 1023 | Feb 2015 | Transcontinental Railroad Depot | State | San Diego | |
| 371 | 764 | Feb 2015 | Sessions Nursery Site | State | San Diego | |
| 372 | 491 | Feb 2015 | Exchange Hotel | None | San Diego | |
| 373 | 711 | Feb 2015 | Montgomery Memorial | Other | San Diego | |
| 374 | 66 | Feb 2015 | Congress Hall Site | None | San Diego | |
| 375 | 1044 | Feb 2015 | Giant Dipper Roller Coaster | None | San Diego | |
| 376 | 798 | Mar 2015 | San Diego State College | State | San Diego | |
| 377 | 616 | Mar 2015 | Las Flores Asistencia | State | San Diego | |
| 378 | 940 | Mar 2015 | Rancho Guajome | State | San Diego | |
| 379 | 562 | Mar 2015 | La Christianita (La Cristianita) | State | San Diego | |
| 380 | 626 | Mar 2015 | Bancroft Ranch House | State | San Diego | |
| 381 | 747 | Mar 2015 | Coloma Road-Rescue | State | El Dorado | |
| 382 | 456 | Mar 2015 | Shingle Springs | State | El Dorado | |
| 383 | 699 | Mar 2015 | Pony Express: Mormon Tavern | State | El Dorado | |
| 384 | 142 | Mar 2015 | Studebaker's Shop Site | Other | El Dorado | |
| 385 | 701 | Mar 2015 | Pony Express: Placerville | State | El Dorado | |
| 386 | 487 | Mar 2015 | Diamond Springs | State | El Dorado | |
| 387 | 702 | Mar 2015 | Pony Express Route | State | Sacramento | |
| 388 | 486 | Mar 2015 | El Dorado (Originally Mud Springs) | State | El Dorado | |
| 389 | 767 | Mar 2015 | Methodist Episcopal Church | Other | El Dorado | |
| 390 | 475 | Mar 2015 | Placerville- Dry Diggins- Old Hangtown | State | El Dorado | |
| 391 | 703 | Mar 2015 | Pony Express: Pleasant Grove House | State | El Dorado | |
| 392 | 571 | Mar 2015 | Salmon Falls | Missing | El Dorado | |
| 393 | 569 | Mar 2015 | Mormon Island | Other | El Dorado | |
| 394 | 572 | Mar 2015 | Condemned Bar | Missing | El Dorado | |
| 395 | 570 | Mar 2015 | Negro Hill | Missing | El Dorado | |
| 396 | 700 | Mar 2015 | Pony Express: El Dorado Nevada House (Mud Springs) | State | El Dorado | |
| 397 | 585 | Mar 2015 | Pioneer Express Trail | State | Placer | |
| 398 | 596 | Mar 2015 | Booth Home Site | Other | Sacramento | |
| 399 | 593 | Mar 2015 | Sutterville | Other | Sacramento | |
| 400 | 595 | Mar 2015 | Eagle Theater | None | Sacramento | |
| 401 | 606 | Mar 2015 | Hastings Building | State | Sacramento | |
| 402 | 666 | Mar 2015 | Camp Union | State | Sacramento | |
| 403 | 608 | Mar 2015 | Orleans Hotel Site | None | Sacramento | |
| 404 | 609 | Mar 2015 | Mills Bank Building | None | Sacramento | |
| 405 | 812 | Mar 2015 | Old Sacramento | State | Sacramento | |
| 406 | 610 | Mar 2015 | Overton Building | None | Sacramento | |
| 407 | 366 | Mar 2015 | Pioneer Telegraph Station | None | Sacramento | |
| 408 | 614 | Mar 2015 | Stanford-Lathrop House | State | Sacramento | |
| 409 | 657 | Mar 2015 | Grave of Alexander Hamilton Willard | Other | Sacramento | |
| 410 | 605 | Mar 2015 | Sacramento Union Site | None | Sacramento | |
| 411 | 600 | Mar 2015 | Headquarters of the Big Four | None | Sacramento | |
| 412 | 566 | Mar 2015 | Sacramento City Cemetery | State | Sacramento | |
| 413 | 601 | Mar 2015 | Western Hotel | None | Sacramento | |
| 414 | 780 | Mar 2015 | Transcontinental Railroad | State | Sacramento | |
| 415 | 607 | Mar 2015 | Adams and Company | None | Sacramento | |
| 416 | 238 | Mar 2015 | Swift's Stone Corral | None | Colusa | |
| 417 | 851 | Mar 2015 | Woodland Opera House | State | Yolo | |
| 418 | 934.01 | Mar 2015 | Temporary Japanese American Detention Camp/Assembly Center - Marysville | Other | Yuba | |
| 419 | 929 | Mar 2015 | Thompson Seedless Grape Site | State | Sutter | |
| 420 | 493 | Mar 2015 | Johnson's Ranch | State | Yuba | |
| 421 | 346 | Mar 2015 | Site of Hock Farm | State | Sutter | |
| 422 | 799.3 | Mar 2015 | Overland Emigrant Trail - Yuba | State | Yuba | |
| 423 | 1003 | Mar 2015 | Wheatland Hop Riot Site | Other | Yuba | |
| 424 | 890 | Mar 2015 | Colusa County Courthouse | State | Colusa | |
| 425 | 864 | Mar 2015 | Gable Mansion | State | Yolo | |
| 426 | 889 | Mar 2015 | Bok Kai Temple | State | Yuba | |
| 427 | 492 | Mar 2015 | Buttonwillow Tree | Other | Kern | |
| 428 | 344 | Mar 2015 | Arroyo de Cantua | State | Fresno | |
| 429 | 474 | Apr 2015 | Searsville Site | State | San Mateo | |
| 430 | 825 | Apr 2015 | Casa de Tableta | State | San Mateo | |
| 431 | 478 | Apr 2015 | Site of San Mateo County's First Sawmill | State | San Mateo | |
| 432 | 909 | Apr 2015 | Our Lady of the Wayside | State | San Mateo | |
| 433 | 93 | Apr 2015 | Woodside Store | State | San Mateo | |
| 434 | 816 | Apr 2015 | Union Cemetery | State | San Mateo | |
| 435 | 856 | Apr 2015 | Ralston Hall | State | San Mateo | |
| 436 | 469 | Apr 2015 | Site of Center of Villa de Branciforte | State | Santa Cruz | |
| 437 | 494 | Apr 2015 | Richardson Adobe (Los Coches Rancho) | Missing | Monterey | |
| 438 | 934.09 | Apr 2015 | Temporary Detention Camp for Japanese Americans/Tanofran Assembly Center | Other | San Mateo | |
| 439 | 393 | Apr 2015 | Hospice (Mission Dolores Outpost) | State | San Mateo | |
| 440 | 846 | Apr 2015 | Southern Pacific Depot: Burlingame | State | San Mateo | |
| 441 | 47 | Apr 2015 | Anza Expedition Camp June 24-27 | State | San Mateo | |
| 442 | 27 | Apr 2015 | Portolá Camp: November 4 | State | San Mateo | |
| 443 | 886 | Apr 2015 | Carolands | None | San Mateo | |
| 444 | 928 | Apr 2015 | Original Mission La Purísima (La Purisima) | State | Santa Barbara | |
| 445 | 353 | Apr 2015 | House of Four Winds | Other | Monterey | |
| 446 | 348 | Apr 2015 | House of Governor Alvarado | State | Monterey | |
| 447 | 939.7 | Apr 2015 | Nitt Witt Ridge | State | San Luis Obispo | |
| 448 | 351 | Apr 2015 | Vásquez House (Vasquez Adobe) | None | Monterey | |
| 449 | 726 | Apr 2015 | Sebastian Store | State | San Luis Obispo | |
| 450 | 821 | Apr 2015 | Morro Rock | State | San Luis Obispo | |
| 451 | 126 | Apr 2015 | Colton Hall | Other | Monterey | |
| 452 | 22 | Apr 2015 | Portolá Camp: October 27 | None | San Mateo | |
| 453 | 105 | Apr 2015 | Royal Presidio Chapel | Other | Monterey | |
| 454 | 1001.1 | Apr 2015 | California Native American Ceremonial Roundhouses - Wassama Roundhouse | State | Madera | |
| 455 | 713 | Apr 2015 | Gutiérrez Adobe (Casa Gutierrez) | Other | Monterey | |
| 456 | 306 | Apr 2015 | Burton Mound | State | Santa Barbara | |
| 457 | 532 | Apr 2015 | Casa de Oro | None | Monterey | |
| 458 | 589 | Apr 2015 | Mountain House Station | State | Kern | |
| 459 | 539 | Apr 2015 | Posey Station | Missing | Kern | |
| 460 | 636 | Apr 2015 | ROYAL SPANISH PRESIDIO | State | Santa Barbara | |
| 461 | 332 | Apr 2015 | Coulterville | State | Mariposa | |
| 462 | 331 | Apr 2015 | Bear Valley | Other | Mariposa | |
| 463 | 248 | Apr 2015 | Gaviota Pass | Other | Santa Barbara | |
| 464 | 414 | Apr 2015 | La Grange | State | Stanislaus | |
| 465 | 1037 | Apr 2015 | Santa Barbara County Courthouse | State | Santa Barbara | |
| 466 | 308 | Apr 2015 | Covarrubias Adobe | State | Santa Barbara | |
| 467 | 721 | Apr 2015 | Carrillo Adobe | State | Santa Barbara | |
| 468 | 559 | Apr 2015 | Hastings Adobe (Trussell-Winchester Adobe) | State | Santa Barbara | |
| 469 | 333 | Apr 2015 | Hornitos | Other | Mariposa | |
| 470 | 361 | Apr 2015 | Old Lobero Theatre | Missing | Santa Barbara | |
| 471 | 670 | Apr 2015 | Mariposa County Courthouse | State | Mariposa | |
| 472 | 518 | Apr 2015 | Agua Fria | Other | Mariposa | |
| 473 | 582 | Apr 2015 | Well, Hill 4 | Other | Santa Barbara | |
| 474 | 323 | Apr 2015 | Mormon Bar | Other | Mariposa | |
| 475 | 409 | Apr 2015 | First Merced County Courthouse (Snelling Courthouse) | Other | Merced | |
| 476 | 375 | Apr 2015 | Tunitas Beach Indian Village | None | San Mateo | |
| 477 | 19 | Apr 2015 | Broderick-Terry Duel | State | San Mateo | |
| 478 | 21 | Apr 2015 | Portolá Camp: October 28-29 | None | San Mateo | |
| 479 | 391 | Apr 2015 | Sánchez Adobe | State | San Mateo | |
| 480 | 92 | Apr 2015 | Portolá Camp: November 11, Pulgas Water Temple | None | San Mateo | |
| 481 | 766 | Apr 2015 | Freeman Junction | State | Kern | |
| 482 | 137 | Apr 2015 | Gordon's Ferry | State | Kern | |
| 483 | 742 | Apr 2015 | Edward Kern Campsite | State | Kern | |
| 484 | 98 | Apr 2015 | Keysville | State | Kern | |
| 485 | 457 | Apr 2015 | Indian Wells | State | Kern | |
| 486 | 290 | Apr 2015 | Kern River Oilfield | State | Kern | |
| 487 | 132 | Apr 2015 | Kernville | State | Kern | |
| 488 | 537 | Apr 2015 | Cottonwood Charcoal Kilns | Other | Inyo | |
| 489 | 100 | Apr 2015 | Havilah | State | Kern | |
| 490 | 796 | Apr 2015 | Farley's Olancha Mill Site | State | Inyo | |
| 491 | 278 | Apr 2015 | Garcés Crossing | State | Kern | |
| 492 | 752 | Apr 2015 | Owens Lake Silver-Lead Furnace | State | Inyo | |
| 493 | 728 | Apr 2015 | Pony Express: Friday's Station | Other | El Dorado | |
| 494 | 40 | Apr 2015 | Kirkwood's | Other | Amador | |
| 495 | 28 | Apr 2015 | Maiden's Grave | Other | Amador | |
| 496 | 99 | Apr 2015 | Walker Pass | State | Kern | |
| 497 | 662 | Apr 2015 | Old Emigrant Road, Silver Lake | State | Amador | |
| 498 | 661 | Apr 2015 | Old Emigrant Road | State | Alpine | |
| 499 | 704 | Apr 2015 | Pony Express: Sportsman's Hall | State | El Dorado | |
| 500 | 1048 | Apr 2015 | Site of Echo Summit | State | El Dorado | |
| 501 | 705 | Apr 2015 | Pony Express: Moores (Riverton) | State | El Dorado | |
| 502 | 706 | Apr 2015 | Pony Express: Webster's Sugar Loaf House | State | El Dorado | |
| 503 | 378 | Apr 2015 | Pioneer Odd Fellows | Other | Alpine | |
| 504 | 707 | Apr 2015 | Pony Express: Strawberry Valley House | State | El Dorado | |
| 505 | 315 | Apr 2015 | Kit Carson Marker | Other | Alpine | |
| 506 | 708 | Apr 2015 | Pony Express: Yank's Station | State | El Dorado | |
| 507 | 94 | Apr 2015 | Portolá Camp: November 5 | None | San Mateo | |
| 508 | 805 | May 2015 | Pony Express Remount Station (Woodford Station) | State | Alpine | |
| 509 | 240 | May 2015 | Marklee's Cabin Site | None | Alpine | |
| 510 | 724 | May 2015 | Pioneer Ski Area of America, Squaw Valley | State | Placer | |
| 511 | 799.2 | May 2015 | Overland Emigrant Trail - Placer | State | Placer | |
| 512 | 797 | May 2015 | Lake Tahoe Outlet Gates | Missing | Placer | |
| 513 | 780.9 | May 2015 | Transcontinental Railroad - Cape Horn Promontory | Other | Placer | |
| 514 | 155 | May 2015 | Lone Star Mill | Other | San Joaquin | |
| 515 | 30 | May 2015 | Lancha Plana | None | Amador | |
| 516 | 262 | May 2015 | Milton | Other | Calaveras | |
| 517 | 251 | May 2015 | Valley Springs | Other | Calaveras | |
| 518 | 365 | May 2015 | Lockeford (Locke's Ford) | Other | San Joaquin | |
| 519 | 254 | May 2015 | Camanche | State | Calaveras | |
| 520 | 257 | May 2015 | Campo Seco | State | Calaveras | |
| 521 | 264 | May 2015 | Double Springs | State | Calaveras | |
| 522 | 266 | May 2015 | Jenny Lind | Other | Calaveras | |
| 523 | 25 | May 2015 | Portolá Camp: October 30 | None | San Mateo | |
| 524 | 263 | May 2015 | Stone Corral | None | Calaveras | |
| 525 | 24 | May 2015 | Portolá Camp: October 31 | State | San Mateo | |
| 526 | 26 | May 2015 | Portolá Camp: October 24-26 | Missing | San Mateo | |
| 527 | 931 | May 2015 | Lodi Arch | State | San Joaquin | |
| 528 | 163 | May 2015 | Wood's Ferry and Wood's Bridge Site | None | San Joaquin | |
| 529 | 740 | May 2015 | Carnegie | State | San Joaquin | |
| 530 | 755 | May 2015 | Corral Hollow | None | San Joaquin | |
| 531 | 358 | May 2015 | Woodbridge | None | San Joaquin | |
| 532 | 520 | May 2015 | San Joaquin Valley College Site | State | San Joaquin | |
| 533 | 339.1 | May 2015 | First Mining in California, Almaden Mine | State | Santa Clara | |
| 534 | 447 | May 2015 | Gubserville | State | Santa Clara | |
| 535 | 435 | May 2015 | Saratoga | State | Santa Clara | |
| 536 | 505 | May 2015 | Almaden Vineyards | State | Santa Clara | |
| 537 | 644 | May 2015 | Murphy Estate Site | State | Santa Clara | |
| 538 | 733 | May 2015 | Paul Masson Mountain Winery | State | Santa Clara | |
| 539 | 339 | May 2015 | New Almaden Quicksilver Mine | State | Santa Clara | |
| 540 | 813 | May 2015 | Montgomery Hill | State | Santa Clara | |
| 541 | 888 | May 2015 | Hayes Mansion | State | Santa Clara | |
| 542 | 800 | May 2015 | Arroyo De San Joseph Cupertino | State | Santa Clara | |
| 543 | 489 | May 2015 | Moreland School | State | Santa Clara | |
| 544 | 458 | May 2015 | Forbes Flour Mill | State | Santa Clara | |
| 545 | 903 | May 2015 | Kotani-En | State | Santa Clara | |
| 546 | 868 | May 2015 | Winchester House | State | Santa Clara | |
| 547 | 434 | May 2015 | City Gardens Site - Nursery of Louis Pellier | Missing | Santa Clara | |
| 548 | 902 | May 2015 | First Unitarian Church Of San Jose | State | Santa Clara | |
| 549 | 952 | May 2015 | Broadcasting Station Site | State | Santa Clara | |
| 550 | 910 | May 2015 | Saint Joseph's Roman Catholic Church | Other | Santa Clara | |
| 551 | 250 | May 2015 | Mission Santa Clara de Asis and Old Spanish Bridge Site | Other | Santa Clara | |
| 552 | 904 | May 2015 | Charles Copeland Morse Residence | State | Santa Clara | |
| 553 | 249 | May 2015 | Old Adobe Woman's Club | State | Santa Clara | |
| 554 | 376 | May 2015 | California Standard Oil Well 1 | None | Kern | |
| 555 | 945 | May 2015 | First Successful Introduction of the Honeybee to California | State | Santa Clara | |
| 556 | 581 | May 2015 | Well 2-6 | Other | Kern | |
| 557 | 417 | May 2015 | Normal School Site | State | Santa Clara | |
| 558 | 260 | May 2015 | Santa Clara Campaign Treaty Site | State | Santa Clara | |
| 559 | 898 | May 2015 | Roberto-Suñol Adobe | State | Santa Clara | |
| 560 | 854 | May 2015 | Old San Jose Post Office | State | Santa Clara | |
| 561 | 461 | May 2015 | State Capitol Site | Other | Santa Clara | |
| 562 | 866 | May 2015 | Peralta Adobe | State | Santa Clara | |
| 563 | 1049 | May 2015 | Guadalupe Mission of San Jose | State | Santa Clara | |
| 564 | 416 | May 2015 | Markham House | Other | Santa Clara | |
| 565 | 433 | May 2015 | El Pueblo De San José De Guadalupe Site | State | Santa Clara | |
| 566 | 939.9 | May 2015 | Grandma Prisbrey's Bottle Village | State | Ventura | |
| 567 | 939.5 | May 2015 | Old Trapper's Lodge | State | Los Angeles | |
| 568 | 659 | May 2015 | Stagecoach Inn | Missing | Ventura | |
| 569 | 979 | May 2015 | Rancho Simi | State | Ventura | |
| 570 | 504 | May 2015 | Buena Vista Refinery | Other | Kern | |
| 571 | 498 | May 2015 | McKittrick Brea Pit | Other | Kern | |
| 572 | 809 | May 2015 | Last Yahi Indian | State | Butte | |
| 573 | 314 | Jun 2015 | Old Suspension Bridge | State | Butte | |
| 574 | 1043 | Jun 2015 | Mother Orange Tree of Butte County | State | Butte | |
| 575 | 330 | Jun 2015 | Bidwell's Bar | Other | Butte | |
| 576 | 770 | Jun 2015 | Oroville Chinese Temple | State | Butte | |
| 577 | 183 | Jun 2015 | First Tehama County Courthouse | State | Tehama | |
| 578 | 313 | Jun 2015 | Hooker Oak | Other | Butte | |
| 579 | 840.2 | Jun 2015 | Chico Forestry Station and Nursery | State | Butte | |
| 580 | 807 | Jun 2015 | Oregon City | State | Butte | |
| 581 | 771 | Jun 2015 | Dogtown Nugget Discovery Site | Other | Butte | |
| 582 | 329 | Jun 2015 | Rancho Chico and Bidwell Adobe | State | Butte | |
| 583 | 117 | Jun 2015 | Home of Mrs. John Brown | None | Tehama | |
| 584 | 12 | Jun 2015 | Residence of General William B. Ide | State | Tehama | |
| 585 | 345 | Jun 2015 | Swift Adobe | Other | Glenn | |
| 586 | 564 | Jun 2015 | Yount Blockhouse Site | State | Napa | |
| 587 | 831 | Jun 2015 | Posted Water Notice Site | Other | Glenn | |
| 588 | 878 | Jun 2015 | First Presbyterian Church | State | Napa | |
| 589 | 693 | Jun 2015 | Grave of George C. Yount | State | Napa | |
| 590 | 828 | Jun 2015 | Veterans Home of California | State | Napa | |
| 591 | 561 | Jun 2015 | Schramsberg Vineyard | State | Napa | |
| 592 | 684 | Jun 2015 | Brannan Store | Other | Napa | |
| 593 | 814 | Jun 2015 | Beringer Brothers Winery | State | Napa | |
| 594 | 687 | Jun 2015 | Napa Valley Railroad Depot | Other | Napa | |
| 595 | 359 | Jun 2015 | Old Bale Grist Mill | Other | Napa | |
| 596 | 685 | Jun 2015 | Brannan Cottage | Other | Napa | |
| 597 | 682 | Jun 2015 | York Cabin Site | State | Napa | |
| 598 | 686 | Jun 2015 | Kelsey House Site | None | Napa | |
| 599 | 563 | Jun 2015 | Charles Krug Winery | State | Napa | |
| 600 | 549 | Jun 2015 | Frog Woman Rock | None | Mendocino | |
