Home / SF Bay Area / Winter 2026-27 / Ultramarathons
Winter ultramarathons near the Bay Area (2026-27)
5 ultramarathons on the calendar from December to February, starting with Woodside Ramble on Saturday December 19. 4 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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Reg. closed
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New Year's One Day
Thu Dec 31 · 8:55 AM · San Jose · South Bay & San Jose
5K30 miles50 miles100 miles
from $90Goes up Dec 1 -
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