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Ultramarathons near the Bay Area (2026-27)

Updated October 17, 2026

4 ultramarathons are coming up near the Bay Area in the next 90 days; the next is Mt. Tam Trail Run on Saturday, November 7 in Stinson Beach. 17 ultramarathons are listed near the Bay Area for the next 12 months.

All Bay AreaSan Francisco (1)East Bay (7)South Bay & San Jose (2)Peninsula (3)Marin (3)Santa Cruz (1)

• Sat7Nov

  Mt. Tam Trail Run

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

  10KHalf marathon18.5 miles30.5 milesTrail

  Reg. closed
• Sat7Nov

  Lake Chabot Trail Run

  Sat Nov 7 · 8:20 AM · Castro Valley · East Bay

  2 miles5K4.8 milesHalf marathon30KMarathonTrail

  from $25Goes up Nov 1
• Sat19Dec

  Woodside Ramble

  Sat Dec 19 · 8:00 AM · Woodside · Peninsula

  10KHalf marathon23.1 miles50KTrail

  Reg. closed
• Thu31Dec

  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
• Sun17Jan

  Spasm Crystal Springs Trail Run

  Sun Jan 17 · 7:50 AM · Woodside · Peninsula

  5 milesHalf marathon22 milesMarathon50KTrail

  from $60Goes up Jan 11
• Sat6Feb

  Golden Gate Trail Run

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

  2 miles8KHalf marathon30KMarathon50KTrail

  from $60Goes up Jan 31
• Sat20Feb

  Montara Mountain Trail Run

  Sat Feb 20 · 7:45 AM · Pacifica · Peninsula

  2 miles10KHalf marathon20.7 milesMarathon50KTrail

  from $60Goes up Feb 14
• Sat20Mar

  Redwood (Spring) Trail Run

  Sat Mar 20 · 7:50 AM · Oakland · East Bay

  2 miles5 milesHalf marathon18.3 milesMarathon50KTrail

  from $30Goes up Mar 14
• Sat17Apr

  Spasm Lake Chabot Trail Run

  Sat Apr 17 · 8:20 AM · Castro Valley · East Bay

  2 miles5 milesHalf marathon17.9 milesMarathon50KTrail

  from $60Goes up Apr 11
• Sat24Apr

  Horseshoe Lake Trail Run

  Sat Apr 24 · 7:50 AM · Los Gatos · South Bay & San Jose

  2 miles5.1 milesHalf marathon30KMarathon50KTrail

  from $60Goes up Apr 18
• Sat1May

  Miwok 100K Trail Race presented by The North Face

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

  100KTrail

  from $310Reg. closed
• Sat8May

  Grizzly Peak Trail Run

  Sat May 8 · 7:50 AM · Berkeley · East Bay

  2 miles10KHalf marathon30KMarathon50KTrail

  from $60Goes up May 2
• Sun23May

  Diablo Trail Run

  Sun May 23 · 7:50 AM · Clayton · East Bay

  2 miles4 miles10 milesHalf marathonMarathon30.4 milesTrail

  from $50Goes up May 17
• Sat5Jun

  Cinderella Trail Run

  Sat Jun 5 · 7:50 AM · Oakland · East Bay

  2 miles8KHalf marathon30KMarathon50KTrail

  from $60Goes up May 30
• Sat10Jul

  San Lorenzo River Trail Run

  Sat Jul 10 · 7:50 AM · Santa Cruz · Santa Cruz

  2 miles10KHalf marathon30KMarathon50KTrail

  from $60Goes up Jul 4
• Sun25Jul

  The San Francisco Marathon

  Sun Jul 25 · 5:15 AM · San Francisco · San Francisco

  Half marathonMarathonUltra (52.4 miles)

  see site
• Sat14Aug

  Redwood (Summer) Trail Run

  Sat Aug 14 · 7:50 AM · Oakland · East Bay

  2 miles5 milesHalf marathon30KMarathon50KTrail

  from $60Goes up Aug 8

Quick answers

How many ultramarathons are near the Bay Area in the next 3 months?

4 ultramarathons are listed near the Bay Area between October 17 and January 15. The next is Mt. Tam Trail Run on Saturday, November 7 in Stinson Beach.

What is the cheapest ultra near the Bay Area right now?

Lake Chabot Trail Run on November 7 has the lowest listed entry fee in the next 90 days: $25. Prices are before the registration platform's processing fee.

When does the next early-bird price end for ultramarathons near the Bay Area?

Lake Chabot Trail Run: the 4.8 miles goes from $60 to $70 after November 1. 12 more of these ultramarathons publish a later price increase.

Are there ultramarathons near the Bay Area 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.