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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.

Mesquite Canyon

Waddell, AZ, US · March 13, 2027 (in 147 days)
Registration open 49.57 miles30.67 miles19.11 miles12.65 miles4.43 miles1.58 miles

Miami 100

Palmetto Bay, FL, US · September 25-26, 2027 (in 343 days)
Registration open 130 miles100 Mile50K

Midstate Massive Ultra Trail

New Ipswich, NH, US · October 10-11, 2026 (7 days ago)
Registration open 100 Mile50 Mile50K

Midwest Everest

Belmont, MI, US · September 25-26, 2027 (in 343 days)
Registration open 100 Mile50 Mile12.4 miles6.2 miles

Millstone Trail Races

Fort Mill, SC, US · February 6, 2027 (in 112 days)
Registration open 31 miles15.5 miles10K

Mind Freak

Marietta, GA, US · September 12, 2026 (35 days ago)
Ran · this year's race is done. distances not checked yet

Miner 49er

Dubuque, IA, US · November 7, 2026 (in 21 days)
Registration open 25K50K

Mines of Spain 100

Dubuque, IA, US · October 16-17, 2026 (yesterday)
Full 100 Mile100K

Mingus Madness 50k

Prescott Valley, AZ, US · November 7, 2026 (in 21 days)
Registration open 50K

Mingus Mayhem

Coos Bay, OR, US · November 14, 2026 (in 28 days)
Registration open 2 hours9 hours

Minnie Ha Ha 6 & 12 hour races

St. Louis, MO, US · October 17, 2026 (today)
Registration open 12hrs6hrs

Miola Madness - Fall Edition

Paola, KS, US · November 7, 2026 (in 21 days)
Registration open 10K12hrs3hrs6hrs9hrs

Mission Trails Twilight Runs

Santee, CA, US · May 22, 2027 (in 217 days)
Registration open 25K50K5K

Mississippi Trail 50

Laurel, MS, US · March 5-6, 2027 (in 139 days)
Registration open 50 Mile12.6 miles50K

Moab 240 Endurance Run

Moab, UT, US · October 9-13, 2026 (8 days ago)
Full 241.8 miles

Moab's Red Hot Ultra

Moab, UT, US · February 27, 2027 (in 133 days)
Registration open 50 Mile50K30K15K

Moccasin Ultra Fest

Memphis, TN, US · December 31 to January 1, 2027 (in 75 days)
Registration open 36hrs

Mogollon Monster 100

Pine, AZ (finish) / Payson, AZ (100 Mile start), US · September 11-12, 2027 (in 329 days)
On the calendar 100.9 miles26.7 miles

Monroe Cross Trail 50 Mile Ultra

DeBary, FL, US · January 23, 2027 (in 98 days)
Registration open 50 Mile17K50K

Montana Meltdown

Bozeman, MT, US · September 25, 2027 (in 343 days)
Registration open 12hrs24hrs4hrs

Monterey Ultra

Monterey, CA, US · February 6, 2027 (in 112 days)
Registration open 50.7 miles

More Miles Last One Standing Challenge

Knoxville, MD, US · June 5, 2027 (in 231 days)
Registration open 1-Mile Mortal Edition4.2-Mile Backyard Ultra

Moscow Mountain Madness

Moscow, ID, US · October 4, 2026 (13 days ago)
Ran · this year's race is done. distances not checked yet

Mount Cheaha 50K

Delta, AL, US · February 20, 2027 (in 126 days)
Registration open 31.6 miles

Mount Mitchell Heartbreaker

Old Fort, NC, US · March 20, 2027 (in 154 days)
On the calendar 49.2 miles32.56 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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