⏵ Course guide · Glorieta Adventure Camps, New Mexico
The Glorieta 12 Hour Endurance Race gives you a 12-hour clock and a 3.2-mile Green Loop at Glorieta Adventure Camps, near Santa Fe, New Mexico, run, ruck, or hike, solo or relay. I will walk you through the format and course first, then give you a pacing and fueling plan built for a full day on a repeatable loop. There are free calculators along the way to dial in your own numbers.
These facts come from the official Feral Adventures event pages. The most recent posted date has already passed and the next date is not yet announced, so check feraladventures.com before you commit.
Forget a fixed finish distance. You get a 12-hour clock starting at 7:00 AM, and the goal is to rack up as many 3.2- mile Green Loop laps as you can, or as many as you want.
The event is open to running, rucking, or hiking, and you can enter solo or as part of a relay team. Ruckers must carry a minimum 20 lb pack for the full 12 hours, a real added load compared to the running or hiking divisions.
The Green Loop is about 3.2 miles with roughly 280 feet of gain and loss and, in the race's own words, "no real big climbs or drops." That keeps the physical demand centered on sustained effort and pacing rather than technical terrain, even as your lap count climbs through the day.
A fully stocked aid station sits at the start/finish with a tented area to store gear, hot food starts at noon, chip timing with live tracking records every lap, pacers can join starting at 1:00 PM, and drop bags plus personal tents up to 10x10 are allowed at start/finish. This is a well-supported event for a full day on your feet.
With a moderate, repeatable loop and no fixed finish distance, pacing here is about sustainability across 12 hours, not surviving a single hard effort.
Pick a per-loop pace you can hold consistently rather than the fastest lap you can survive early. Since every loop is the same 3.2 miles with the same moderate elevation change, a steady, repeatable pace across many laps will out-produce an aggressive start that fades by hour six.
⏵ Free tools to plan your effort
You pass the start/finish aid station every lap, a real logistical advantage over events where you carry everything yourself.
Hot food service does not start until noon, so plan your own carried nutrition for the morning hours before then. Aim for roughly 60 to 90 grams of carbohydrate per hour while moving and sodium in the 300 to 700 mg per liter range, adjusted for an early-May New Mexico day at Glorieta's foothills elevation, cool at the 7:00 AM start and warmer by midday.
⏵ Build your fueling plan
Get a carb, sodium, fluid, and caffeine plan per hour built for your weight, your target hours on course, and an early-May New Mexico day with the free ultra fueling calculator. Browse the rest of the free running tools at the tools hub.
⏵ Train for it with Summit Line
Get a training plan built around YOUR fitness and the kind of sustained, repeatable time-on-feet this loop format demands. Summit Line reads your real training, builds the durability a 12-hour effort asks for, and rehearses your fueling so race day is something you execute, not guess at.
The most recently scheduled edition ran May 2, 2026, and that date has already passed. Feral Adventures has not yet published a date for the next edition. This is historically an early-May race, so plan on a similar spring weekend, but confirm the exact date once it posts on feraladventures.com.
You get a 12-hour clock, starting at 7:00 AM with a mandatory race briefing at 6:50 AM, to complete as many laps of the 3.2-mile Green Loop as you can, or as many as you want. It is chip timed with live tracking, so your total lap count and distance are recorded automatically as you pass through the start/finish each time.
The Green Loop itself is not technically demanding, about 280 feet of gain and loss per 3.2-mile lap with "no real big climbs or drops," so this is much more a test of sustained effort and pacing across a full 12 hours than a technical mountain challenge. The real difficulty scales with how many laps you choose to chase and whether you take the ruck division, which requires carrying a minimum 20 lb pack the entire time.
Yes. The event is explicitly open to running, rucking, or hiking, solo or as part of a relay team. Ruckers must carry a minimum 20 lb pack throughout the 12 hours, and pacers are allowed to join starting at 1:00 PM if you want company for the later laps.
The moderate, repeatable 3.2-mile loop with a fully stocked start/finish aid station makes this a forgiving first timed race: you pass your own gear and support constantly, and there is no requirement to hit a minimum distance, you can simply run, ruck, or hike as many laps as you are comfortable with inside the 12 hours.
With hot food available from noon and a fully stocked aid station at every lap, you have real support to lean on, but you should still plan your own intake for the hours before food service starts. Aim for roughly 60 to 90 grams of carbohydrate per hour while moving and sodium in the 300 to 700 mg per liter range, adjusted for an early-May New Mexico day at Glorieta's foothills elevation. Use the free ultra fueling calculator to build your own per-hour numbers.
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<a href="https://runsummitline.com/guides/glorieta-12-hour-endurance-race">The Glorieta 12 Hour Endurance Race course guide</a><iframe src="https://runsummitline.com/embed/race/glorieta-12-hour-endurance-race" style="width:100%;max-width:420px;height:180px;border:0;" loading="lazy" title="Glorieta 12 Hour Endurance Race course guide by Summit Line"></iframe>This guide is independent and for planning only. The format, dates, and entry rules come from public sources and can change year to year, so confirm the current specifics with the official race before you register or run. The fueling and pacing advice is general and not medical advice.
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