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Ultramarathons in Marin (2026-27)

Updated October 17, 2026

1 ultra is coming up in Marin in the next 90 days; the next is Mt. Tam Trail Run on Saturday, November 7 in Stinson Beach. 3 ultramarathons are listed in Marin for the next 12 months.

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• Sat7Nov

  Mt. Tam Trail Run

  Sat Nov 7 · 7:30 AM · Stinson Beach · Marin

  10KHalf marathon18.5 miles30.5 milesTrail

  Reg. closed
• Sat6Feb

  Golden Gate Trail Run

  Sat Feb 6 · 7:50 AM · Sausalito · Marin

  2 miles8KHalf marathon30KMarathon50KTrail

  from $60Goes up Jan 31
• Sat1May

  Miwok 100K Trail Race presented by The North Face

  Sat May 1 · 5:00 AM · Stinson Beach · Marin

  100KTrail

  from $310Reg. closed

Quick answers

How many ultramarathons are in Marin in the next 3 months?

1 ultra is listed in Marin between October 17 and January 15. The next is Mt. Tam Trail Run on Saturday, November 7 in Stinson Beach.

When does the next early-bird price end for ultramarathons in Marin?

Golden Gate Trail Run: the 8K goes from $60 to $70 after January 31.

Are there ultramarathons in Marin this weekend?

None are listed for October 17 to October 18. The next is Mt. Tam Trail Run on Saturday, November 7 in Stinson Beach.