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

Sierra Nevada

• Tehachapi Summit (SR 58), 4032
  • Legislative Route 58 (1931)

(several relatively low crossings of the Piute Mountains here)

• 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)

(there may be an unnamed crossing in here)

• 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)

(some unnamed crossings here)

• 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

(at least one unnamed crossing)

• 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