Saturday, May 20, 2017

Jemez Mountain

650 North Mesa Road

Los Alamos, NM 50 Miler, 50K, 15 Miler

This Event Took Place Sat. May 20, 2017

COVID-19 Update

2021 Race Update – January 9, 2021

Hello JMTR Supporters,

The JMTR race organization has decided to delay race registration until March 15th to allow us to better assess our ability to hold the event and the impact that the pandemic will have on the race format. New Mexico currently has restrictions on group gatherings to no more than 5 people and quarantine requirements for people coming from out-of-state. Planning for the JMTR is very difficult because of the large uncertainty on potential restrictions that may be in place on race day along with our ability to obtain permits from the National Forest Service, Los Alamos National Laboratory, and Los Alamos County. The race organization is committed to defining the race format before registration is open to ensure that runners understand what they are registering for. In addition, we will need to ensure to follow New Mexico COVID guidance which may limit participation from out-of-state runners. The race organization will reassess the impact from the pandemic on our ability to hold the race in early March and provide an update on the status of the 2021 race. We appreciate your patience and hope that you all stay healthy.

JMTR Organization


The Jemez Mountain Trail Runs take place in the Jemez Mountains of northern New Mexico. The races starts and ends in the town of Los Alamos. Registration will open for all races on March 15th 2021. Pricing to be updated once race format is decided. Entry fees will be $55 for the 15 mile, $75 for the 50km, and $90 for the 50 mile. On March 15th, the entry fee will increase by $20 for all races. Registration will close on May 13th. No registrations after this date. Please be aware of the required gear policy which is described in detail on the JMTR web page.

Course Description

The Jemez Mountains Trail Runs has gained a reputation as a very difficult course. The course is on technical trails with a substantial amount of elevation change. The 50k and 50 mile events include extremely steep climbs and descents on very technical terrain. On the course, runners will experience high altitude (from 7,000 to over 10,000 feet above sea level), fallen trees, and other obstacles. in past years, runners have experienced weather extremes including heat, cold, rain, snow, lightning and wind. Runners are encouraged to consider their comfort level on this type of terrain and weather before registering.

COURSE UPDATE: For 2021, the 15 mile and 50km races will remain the same as in previous years. The 50 mile course route will be 2 miles longer than last year (~53 miles). Be aware that the cutoff times will be similar to last year. Runners who were close to the cutoff last year may be in jeopardy of missing them because of the increased distance.

50km Ruck Race

The JMTR is proud to offer the first instance of a rucking division in the 50 kilometer distance (starting shortly after the 50k runners). The required ruck weight required will be 20lbs dry not including the JMTR required race gear (jacket, water, etc). Since this is a difficult distance at altitude, completion of a rucking race of minimum distance of 15 miles is required. Exceptions to the entry requirement may be approved by sending a detailed description of your qualifications to race management. Rucking is not a trivial endeavor and should be trained for like any ultra-distance endurance event. Cut off times for the ruck division will follow closely with the 50 km and 50 mile cut off times in order to make sure the course is clear at an appropriate time.

What is rucking? Rucking, in it’s simplest form, is moving from location A to location B with your pack. The term comes from the military and the packs they move with weigh a ton. When the military rucks they do it with essential items like weapons, ammunition, etc. When we ruck we do so with weight so that we can achieve a great workout. The main idea is that you will carry heavy weight over a long distance. More information can be found at:

Mandatory Gear Policy

The purpose of the mandatory gear policy is to enhance the safety of runners and event staff in the event of inclement weather. History has shown that a fraction of runners are unprepared in the event of bad weather and this ultimately affects everyone. In the event of ongoing or forecasted inclement weather, the race management may require runners to leave the start and/or drop-bag-accessible aid stations with gear that will keep runners reasonably warm and dry. A waterproof rain jacket with hood, hat, and gloves are recommended. Garbage bags are not considered appropriate rain gear. Aid station staff have authority to decide if the mandatory gear requirements are met and their decision is final. Race management will make the decision what mandatory gear, if any, is required based on actual and forecasted weather conditions. The race recommends that appropriate inclement weather clothing is staged in runner’s drop bags.

Refund and Waitlist Policy

We will maintain a wait list and allow for partial refunds to runners that register but cannot participate on race day. We offer a 50% refund only before May 1, 2021 and only if your spot can be filled. Starting on May 1, 2021 all entry fees are nonrefundable. No refunds are granted if there is no one on the wait list to take your spot. NO transfer of entry to another person and NO transfer of entry to another year are permitted. Please don't Email us asking for a refund. Why should we make an exception for you? We will maintain a separate wait list for each race through the Ultra Signup site. If this refund policy bums you out, remember we are a non-profit race and all race proceeds benefit local organizations or charities.

Local time: 8:17 AM


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