Home / SF Bay Area / Winter 2026-27 / Trail races
Winter trail races near the Bay Area (2026-27)
12 trail races on the calendar from December to February, starting with Midway Shelter Winter Run / Walk ~ 5k, 10k and Kids Run on Saturday December 5. 9 of them publish an upcoming price increase, so signing up early saves money.
All winter races5K races (28)10K races (25)Half marathons (22)Marathons (3)Ultramarathons (5)Trail races (12)
By date
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Midway Shelter Winter Run / Walk ~ 5k, 10k and Kids Run
Sat Dec 5 · 8:30 AM · Alameda · East Bay
5K10KTrail
from $45Goes up Dec 5 -
Reg. closed
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from $73Goes up Nov 8
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Reg. closed
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from $73Goes up Dec 5
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from $68Goes up Oct 25
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8th Annual Kiwanis Resolution 5K Run/Walk, and 10K Run/Walk
Sat Jan 2 · 10:00 AM · Mountain View · South Bay & San Jose
5K10KTrail
from $50Goes up Nov 30 -
Spasm Crystal Springs Trail Run
Sun Jan 17 · 7:50 AM · Woodside · Peninsula
5 milesHalf marathon22 milesMarathon50KTrail
from $60Goes up Jan 11 -
Golden Gate Trail Run
Sat Feb 6 · 7:50 AM · Sausalito · Marin
2 miles8KHalf marathon30KMarathon50KTrail
from $60Goes up Jan 31 -
Montara Mountain Trail Run
Sat Feb 20 · 7:45 AM · Pacifica · Peninsula
2 miles10KHalf marathon20.7 milesMarathon50KTrail
from $60Goes up Feb 14 -
Beer City Half™ Santa Rosa
Sat Feb 20 · 8:30 AM · Santa Rosa · Napa & Sonoma
1 mile5K10KHalf marathonTrail
from $25Goes up Nov 23 -
from $60Goes up Feb 21