Available distances
About
Spence Mountain Run is held on May 29, 2027, in Klamath Falls, Oregon. The 50K (31.1 mi) starts at 7:00 a.m., the 30K (18.6 mi) at 8:00 a.m. and the half marathon (13.1 mi) at 8:30 a.m., on technical singletrack with rocky sections throughout.
Technical singletrack is the surface that punishes road fitness most: your pace is set by the ground rather than by your legs, and a strong runner with no trail experience will be passed by weaker ones who look further ahead. Practise on rocky terrain before entering, and choose the half marathon first — on this kind of course it is a serious race in its own right.
Highlights
- Mountain
- Off-road
- Forest
- Lakes and ponds
Prepare for Spence Mountain Run with RunRun
An AI-generated training plan, adjusted every week based on your real sessions. Built around your goal, current level and race date.
- Personalized plan based on your VO2max, history and weekly availability
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- Target paces, long runs, key sessions: everything is calculated for race day
Races nearby
Other upcoming races around Klamath Falls.
Moore Mountain Trail Festival
Sep 26, 2026 · Klamath Falls, OR · 0 mi away
18.6 mi · 13.1 mi · 3.1 mi
Lithia Loop Trail Marathon
Nov 7, 2026 · Ashland, OR · 47 mi away
26.2 mi · 13.1 mi · 6.2 mi
Mt. Ashland Hillclimb Run
Jun 6, 2027 · Ashland, OR · 47 mi away
13.3 mi
Siskiyou Out Back Trail Running Festival
Jul 10, 2027 · Ashland, OR · 47 mi away
62.1 mi · 31.1 mi · 9.3 mi · 5 mi