Wikipedia:WikiProject U.S. Roads/California/History/Major mountain passes

Sierra Nevada
(several relatively low crossings of the Piute Mountains here) (there may be an unnamed crossing in here) (some unnamed crossings here) (at least one unnamed crossing)
 * Tehachapi Summit (SR 58), 4032
 * Legislative Route 58 (1931)
 * Bird Spring Pass (Bird Spring Canyon Road), 5355
 * Walker Pass (SR 178), 5246
 * Legislative Route 57 (1919)
 * Unnamed (CR J41), 6250 (Sherman Pass, 9140, is farther west)
 * Unnamed (trail), 7250
 * Sacatar Trail
 * Haiwee Pass (trail, unconstructed SR 190), 8200
 * Olancha Pass (trail), 9200
 * Mulkey Pass (trail), 10400
 * Trail Pass (trail), 10500
 * Cottonwood Pass (trail), 11150
 * New Army Pass (trail), 11900
 * Army Pass (trail), 11600
 * Vacation Pass (trail), 12700
 * Baxter Pass (trail), 12300
 * Sawmill Pass (trail), 11300
 * Taboose Pass (trail), 11400
 * Bishop Pass (trail), 11900
 * Piute Pass (trail), 11550
 * Pine Creek Pass (trail), 11100
 * Holy Pass (trail), 12350
 * Mono Pass (trail), 12050
 * Hopkins Pass (trail), 11450
 * McGee Pass (trail), 11900
 * Mammoth Pass (trail), 9700
 * Minaret Summit (SR 203), 9175
 * Agnew Pass (trail), 9500
 * Island Pass (trail), 10200
 * Donohue Pass (trail), 11050
 * Parker Pass (trail), 11100
 * Mono Pass (trail), 10600
 * Tioga Pass (SR 120), 9943
 * Great Sierra Wagon Road (1883)
 * Legislative Route 40 (1915)
 * Rock Island Pass (trail), 10150
 * Buckeye Pass (trail), 9572
 * Dorothy Lake Pass (trail), 9500
 * Emigrant Pass (trail), 9650
 * Sonora Road (1852)
 * Sonora Pass (SR 108), 9643
 * Sonora and Mono Wagon Road (1868)
 * Legislative Route 13 (1901)
 * Wolf Creek Pass (trail), 8400
 * Ebbetts Pass (SR 4), 8732
 * Big Trees Road (1856)
 * Big Tree and Carson Valley Turnpike (1863-1910)
 * Legislative Route 24 (1911)
 * Carson Pass (SR 88), 8573
 * Carson Route (1848)
 * Amador and Nevada Wagon Road (1863)
 * Legislative Route 34 (1911)
 * Echo Summit (US 50), 7377
 * Johnson Pass (old US 50), 7377
 * Georgetown/Dagget Pass Trail (1850), Johnson Cutoff (1850-51)
 * Lake Tahoe Wagon Road (1861-1886)
 * Legislative Route 11 (1895)
 * Barker Pass (trail), 7700
 * Emigrant Pass (trail), 8700
 * Placer County Emigrant Road (1852)
 * Roller Pass (trail), 7850
 * Truckee Route (1846)
 * Cold Stream Pass (trail), 7850
 * Donner Pass (old US 40), 7088
 * Truckee Route (1844-1846)
 * Dutch Flat and Donner Lake Wagon Road (1864-1871)
 * Legislative Route 37 (1909)
 * Euer Saddle (I-80), 7239
 * Henness Pass (Henness Pass Road), 6920
 * Henness Pass Road (1852)
 * Henness Pass Turnpike/Truckee Turnpike joint (1860)
 * Little Truckee Summit (SR 89), 6400
 * Legislative Route 83 (1933)
 * Unnamed (Lemon Canyon Road), 6905
 * Unnamed (Smithneck Road), 6400
 * Beckwourth Pass (SR 70), 5212
 * Beckwourth Trail (1851)
 * Legislative Route 21 (1931)
 * Unnamed (Doyle Grade), 6050
 * Unnamed (Milford Grade), 6056
 * Unnamed (Janesville Grade), 6050
 * Fredonyer Pass (SR 36), 5748
 * Legislative Route 29 (1910)

Great Basin Divide (south of Sierra Nevada)

 * Tecate Divide (SR 94), 3890
 * Tecate Divide (I-8), 4140
 * Julian (SR 78), 4220
 * Teofulio Summit (CR S2), 3660
 * Unnamed (CR S22), 4220
 * Santa Rosa Summit (SR 74), 4977
 * San Gorgonio Pass (I-10), 2570
 * Onyx Summit (SR 38), 8443
 * Lake View Point (SR 18), 7117
 * Crestline (SR 138), 4860
 * Cajon Pass (SR 138), 3800
 * Cajon Summit (I-15 northbound), 4190
 * Cajon Summit (I-15 southbound), 4259
 * Mountain Top (SR 138), 4770
 * Blue Ridge Summit (SR 2), 7386
 * Vincent Gap (SR 2), 6593
 * Islip Saddle (SR 2/SR 39), 6658
 * Unnamed (SR 2), 6700
 * Three Points (SR 2), 5911
 * Soledad Pass (SR 14), 3210
 * Bushnell Summit (CR N2), 4100
 * Unnamed (SR 138), 3340

Great Basin Divide (north of Sierra Nevada)

 * Unnamed (CR A21), 5853
 * Unnamed (SR 44), 5758
 * Unnamed (SR 139), 5692
 * Sage Hen Summit (US 395), 5566
 * Cedar Pass (SR 299), 6305

Divide between Pacific Coast and Central Valley

 * Tejon Pass (I-5), 4144
 * Unnamed (Lockwood Valley Road), 5561
 * Apache Saddle (Mil Potrero Highway), 6100
 * Grocer Grade (SR 33/SR 166), 2968
 * San Juan Grade (SR 58), 2100 (west edge of Carrizo Plain)
 * Unnamed (SR 58), 3258 (east edge of Carrizo Plain)
 * Polonio Pass (SR 46), 1764
 * Cottonwood Pass (SR 41), 2010
 * Parkfield Grade (Parkfield-Coalinga Road), 3506
 * Unnamed (SR 198), 2518
 * Unnamed (Los Gatos Road), 2900
 * Clear Creek Summit (Clear Creek Road), 4441
 * Panoche Pass (CR J1), 2130
 * Pacheco Pass (SR 152), 1368
 * Unnamed (SR 130), 2385
 * Corral Hollow Pass (CR J2), 1600
 * Patterson Pass (Patterson Pass Road), 1602
 * New Altamont Pass (I-580), 1009
 * Old Altamont Pass (old US 50 and RR), 740
 * Unnamed (Vasco Road), 950
 * Unnamed (Marsh Creek Road), 956
 * New Kirker Pass (Kirker Pass Road), 950
 * Unnamed (Bailey Road), 700
 * Willow Pass (SR 4), 425
 * Unnamed (I-80), 450
 * Creston (SR 12), 330
 * Unnamed (SR 121), 1265
 * Unnamed (SR 128), 980
 * Unnamed (SR 29), 2260
 * Unnamed (SR 175), 2496
 * Unnamed (SR 20), 1500
 * Goods Mountain Summit (SR 36), 3810
 * Buckhorn Summit (SR 299), 3240
 * Black Butte Summit (I-5), 3900