New Mexico · 50 Mile · 50K · 15 Mile
Jemez Mountain Trail Runs
Jemez Mountain Trail Runs is a 50 Mile, 50K and 15 Mile event held in Los Alamos, New Mexico. Its next confirmed date is Saturday, May 15, 2027. About 500 runners take part across all distances.
- Race day
- May 15, 2027
- Location
- Los Alamos, NM
- Field size
- ~500 runners
Race details
- Date
- Saturday, May 15, 2027
- Location
- Los Alamos, New Mexico
- Distances
- 50 Mile, 50K, 15 Mile
- Field size
- About 500 runners
- Course
- 7,000 to over 10,000 ft (very steep, technical mountain terrain)
- Registration
- ultrasignup.com
- Official website
- jemezmountaintrailruns.org
Registration, course & weather
- Registration status
- Registration status as last checked October 8, 2026: not announced
- Start time
- 5:00 AM MDT
- Course profile — 50 Mile
- Loop course; Trail surface; Not USATF certified
- Course profile — 50K
- Loop course; Trail surface; Not USATF certified
- Course profile — 15 Mile
- Loop course; Trail surface; Not USATF certified
About the Jemez Mountain Trail Runs
A grueling high-altitude mountain ultra in the Jemez Mountains starting and finishing in Los Alamos, featuring extremely steep, technical climbs and descents.
Rankings and notes
- Rankings and awards
- Long-established Western ultra; well-reviewed on RaceRaves and a regional classic
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Jemez Mountain Trail Runs: common questions
- When is the Jemez Mountain Trail Runs?
- The next confirmed date is Saturday, May 15, 2027.
- Where is the Jemez Mountain Trail Runs held?
- In Los Alamos, New Mexico.
- What distances does the Jemez Mountain Trail Runs offer?
- 50 Mile, 50K and 15 Mile.
- How many people run the Jemez Mountain Trail Runs?
- About 500 runners across all of its distances. That figure is an estimate of the field size, not an entry cap.
- How do I register for the Jemez Mountain Trail Runs?
- Registration is handled by the organiser at ultrasignup.com. Entry fees, caps and deadlines are set there.
- Is registration open for the Jemez Mountain Trail Runs?
- Registration status as last checked October 8, 2026: not announced.
- What time does the Jemez Mountain Trail Runs start?
- 5:00 AM MDT.
Plan this race in RaceRove
Save it to your plan, compare it with other races, check typical race-day weather and track your 50-state progress in the interactive app.