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About RaceIndexOur methodologyData coverageCyclingTriathlon
  • Ultramarathon
  • 80.5 km
  • Los Alamos
  • Open entry

Jemez Mountain Trail Runs Ultramarathon

This race edition

Race date
Date not confirmed for this distance
Race timezone
Timezone not confirmed
Edition status
Status not confirmed

Entry options

2027 edition

Entry options are not yet confirmed for this edition. Check the organiser before making plans.

View verified GPS mapOfficial event website & entry ↗
Data current as of

Decision summary

Jemez Mountain Trail Runs Ultramarathon at a glance

Evidence depth
38 verified facts

Stored GPS route

Quick answers

What runners ask first

Jemez Mountain Trail Runs Ultramarathon route map

raceindex.org has a GPS course file for Jemez Mountain Trail Runs Ultramarathon, so runners can inspect the route line on the map. Elevation charts and ascent figures appear only when that file includes usable elevation data.

How hilly is the Jemez Mountain Trail Runs Ultramarathon?

The Jemez Mountain Trail Runs Ultramarathon is described as mountainous. The course listing puts the climb at 3,786 m.

Where does the Jemez Mountain Trail Runs Ultramarathon route go?

The Jemez Mountain Trail Runs Ultramarathon route starts at Posse Lodge (Posse Shack), North Mesa, Los Alamos, NM and finishes at Posse Lodge (Posse Shack), North Mesa, Los Alamos, NM. Underfoot, expect trail. It passes Posse Lodge, Los Alamos Canyon, Pajarito Mountain, Camp May Road and Valles Caldera National Preserve. High-altitude mountain trail event with all races run from 7,000 to over 10,000 feet above sea level.

What should runners know on race day for the Jemez Mountain Trail Runs Ultramarathon?

10. Pacers are allowed for the 50 mile race starting at the first pass through the Mitchell aid station (mile 33.8).

Race character

Scenery

  • Mountain
  • Countryside
  • Canyon
  • Desert
  • Coastal
  • Forest

Atmosphere

  • Wilderness
  • Destination

Terrain

  • Trail
  • Road
Elevation character
Mountainous
Technicality
Very Technical
Source-stated ascent
3,786 m

Entry, logistics and records

Entry requirements

Entry status
Open entry: The held registration model is open entry and this edition is not marked sold out.
Cut-off
50 mile: Ice Rink (24.7 mi) 12:00pm mandatory switch to 50K, Mitchell first pass (33.8 mi) 2:20pm mandatory switch to 50K, Mitchell second pass (49.0 mi) 8:20pm. 50K: Camp May Road (21.7 mi) 3:00pm, Ice Rink (24.7 mi) 5:00pm, Mitchell (27.9 mi) 8:20pm. 15 mile: no cutoffs (expected finish under 7 hours).
Qualification status
No qualifier or lottery; open registration via UltraSignup, enforced by strict intermediate cutoffs on the 50 mile and 50K. The 50 mile has mandatory downgrades to the 50K if cutoffs are missed.
ITRA points
4 points

Race day logistics

Aid stations
10
Pacers
Pacers are allowed for the 50 mile race starting at the first pass through the Mitchell aid station (mile 33.8).

Access and course status

Start
Posse Lodge (Posse Shack), North Mesa, Los Alamos, NM
Finish
Posse Lodge (Posse Shack), North Mesa, Los Alamos, NM

Course facts

Surface
Trail
Landmarks
Posse Lodge, Los Alamos Canyon, Pajarito Mountain, Camp May Road, Valles Caldera National Preserve, Mitchell aid station, Ski Lodge / Ice Rink
Notable features
  • Run as a nonprofit since 2006, JMTR has donated close to $300,000 to local organizations and scholarships, benefiting the Los Alamos High School Cross Country Team and other local organizations
  • High-altitude mountain trail event with all races run from 7,000 to over 10,000 feet above sea level. The 50 mile and 50K are UTMB qualifiers (50 mile = 4 points, 50K = 2 points)
  • Start times stagger by distance: 50 mile at 5:00am, 50K at 6:00am, 15 mile at 8:00am. The 50 mile course is roughly 53 miles. A bear bell is mandatory in the Valles Caldera National Preserve section
  • Technical high-altitude mountain trails ranging 7,000 to over 10,400 feet, including runnable singletrack, long extended climbs, steep technical descents, fallen trees and remote cross-country grassy plains. The high point is the summit of Pajarito Mountain (~10,441 ft) at mile 17
  • the low point is the bottom of Los Alamos Canyon at mile 9. The ~3,200 ft climb up Pajarito from Camp May Road is the bulk of the gain for the 50K and 50 mile

How we calculated this

Published facts and derived model outputs on this page are tied to stored sources or a published, version-locked methodology. We show the provenance so runners, coaches and organisers can check it. Data on this page is current as of .

Derived numbers use scoring-methodology-v1.0.

Sources used on this page (1)

Read the full methodology →