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Ultras

Ultras, and what they ask of you

Cutoffs, crew access, drop bags, and where your people can park. Nothing here needs an account.
Free, and always will be. NavRun makes money from race-day planning for runners who want it, never from this. Ultras change constantly, sometimes the morning of. Always confirm with the race director and the official website before you rely on anything here.
Not sure which one yet? Watch one first. Course previews and films, made by people who were out there.
883 races

Every race we hold Twenty five at a time. Search a race by its name, or by the name it used to have.

Mountain Creek Mayhem

Gardners, PA, US · September 19, 2026 (28 days ago)
Ran · this year's race is done. 20 miles

Mountain Lakes 100

Detroit, OR, US · September 18-19, 2027 (in 336 days)
On the calendar 101.3 miles

Mountain Mama Farms Classic

Summerville, GA, US · November 21, 2026 (in 35 days)
Registration open 4hrs8hrs

Mountain Man Ultra

Waterville, PA, US · September 26, 2026 (21 days ago)
Ran · this year's race is done. 50K

Mountain Masochist Trail Run

Montebello, VA, US · November 7, 2026 (in 21 days)
Waitlist only 100K50 Mile50K

Mountaineer Rumble 10 Mile-50K-100K-100 Miler

Blacksburg, SC, US · November 7, 2026 (in 21 days)
Registration open 100 miles10 miles100K50K

Mountaineer Rumble 12 Hour

Clover, SC, US · September 12-13, 2026 (35 days ago)
Ran · this year's race is done. 12hrs

Mt. Tam Trail Run

Stinson Beach, CA, US · November 7, 2026 (in 21 days)
Full 30 miles18.5 miles13 miles6.8 miles

Mt. Taylor 50k

Grants, NM, US · September 26, 2026 (21 days ago)
Ran · this year's race is done. 30.28 miles

Mujeres and Marigolds

Smithville, TX, US · October 24, 2026 (in 7 days)
Registration open 100K10K25K50K5K

MuleSkinner Endurance Races

Upper Black Eddy, PA, US · October 10, 2026 (7 days ago)
Ran · this year's race is done. MarathonHalf Marathon50 Mile50K

Naked Mountain Ultra

Albemarle, NC, US · March 6, 2027 (in 140 days)
Registration open 50 Mile25 miles10 miles

Naked Nick

Leesport, PA, US · December 19, 2026 (in 63 days)
Registration open 15.5 miles50K

Napa Wilderness Trail Runs

Napa, CA, US · May 15, 2027 (in 210 days)
Registration open 32.4 miles18.2 miles13.9 miles6.1 miles

Natchez Trace Trail Run

Franklin, TN, US · November 7, 2026 (in 21 days)
Waitlist only 51.1 miles26.4 miles14.1 miles13 miles

Naughty Hog

Valley View, TX, US · December 12, 2026 (in 56 days)
Registration open 15.02 miles6.21 miles3.11 miles100K50K

Nelsons Summit 50/50

Salamanca, NY, US · October 24, 2026 (in 7 days)
Registration open 50 Mile25K50K

Never Summer 100k & 60k

Gould, CO, US · July 30 to August 1, 2027 (in 286 days)
On the calendar 65.7 miles39.2 miles

New Hope Wesleyan Ultra Trail Run

Corydon, IN, US · October 24, 2026 (in 7 days)
Registration open 31.1 milesHalf Marathon6.6 miles3.1 miles

New River Trail Races

Fries, VA, US · April 9-10, 2027 (in 174 days)
Registration open 100 Mile100K25K50K5K10K

NIGHT CLAW

Glen Rose, TX, US · July 17, 2027 (in 273 days)
Registration open 10K20K4 Hour5K6 Hour8 Hour

Night Hawk 50K, 20M and 10M

Lawrence, KS, US · June 26, 2027 (in 252 days)
On the calendar 20 miles10 miles50K

Night Howler 50

Hoover, AL, US · June 26, 2027 (in 252 days)
Registration open 50 Mile

Night Train 100K, 50k and Half Marathon

Farmville, VA, US · June 19, 2027 (in 245 days)
Registration open Half Marathon100K50K5K

Nine Trails 35 Mile Endurance Run

Santa Barbara, CA, US · March 13, 2027 (in 147 days)
Registration open 35 miles17 miles
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How this gets better. Every race here was read off the race's own pages and sourced fact by fact. Where nobody has checked something, it says so instead of guessing.
See something wrong or out of date? Open the race and use the form at the bottom of its page.
Are you the race director? The same page has a form that comes straight to us, and we write back.
Anything else: [email protected]
Got one on the calendar?

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