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Lake Sonoma
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Lake Sonoma LS 50k

50.0km·1740m+
April 11
Geyserville,
United States
itra
The plan will appear closer to the race. For now, check a previous season's plan.

Race Pace Calculator · GPX Analyzer · Trail Finder

Other races: United States

  • HOKA Pacific Trails California by UTMB · Pacific Trails 50KNovember 13, 2026 · 50.0km
  • Dead Horse Ultra · Dead Horse 50KNovember 14, 2026 · 50.0km · 855m+
  • Dead Horse Ultra · Dead Horse 30KNovember 14, 2026 · 30.0km · 527m+
  • Dead Horse Ultra · Dead Horse 50 MileNovember 14, 2026 · 80.5km · 1492m+
  • Dead Horse Ultra · Dead Horse 15KNovember 14, 2026 · 15.0km · 284m+

Read

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  • Downhill Running Muscle Damage: Why Descents Wreck Quads

Full calendar: United States50K trail race calendar

About Lake Sonoma LS 50k

Lake Sonoma LS 50k is the 50.0km ultra trail at Lake Sonoma 2026 (Geyserville, United States). The race starts on April 11, 2026.

Course

The course climbs 1740m+. With 35m/km of climbing, this is a rolling, mostly runnable course.

Results

227 finishers completed the 2026 edition. Men's winner: Robbie Simpson (Great Britain) in 3:39:39. Women's winner: Hannah Allgood (United States) in 4:19:36.

This page has the full results and splits, a pacing and nutrition planner, a gradient matrix, an interactive elevation profile and historical weather for Lake Sonoma LS 50k.

Other distances of Lake Sonoma 2026Lake Sonoma LS 100k (100km)·Lake Sonoma TS 13.1 Mile (21.0km)