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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.

Shawnee Hills Trail Races

Ozark, IL, US · August 21-22, 2027 (in 308 days)
Registration open 100 Mile64 miles32 milesHalf Marathon50K

Shawnee Trail Runs

West Portsmouth, OH, US · October 3, 2026 (14 days ago)
Ran · this year's race is done. 54 miles31.88 milesHalf Marathon

Shore2Shore

East Islip, NY, US · April 17, 2027 (in 182 days)
Registration open 25K50K

Signal Peak Trail Runs

Emigrant Gap, CA, US · October 3, 2026 (14 days ago)
Cancelled 30.95 miles24 miles

Silver Moon Race

Reedley, CA, US · April 17-18, 2027 (in 182 days)
Registration open 100 Mile25 miles12.5 miles7.5 miles12hrs24hrs6hrs

Siskiyou Out Back Trail Runs

Ashland, OR, US · July 9-11, 2027 (in 265 days)
Registration open 100.2 miles61.18 miles30.8 miles9.5 miles5 miles

Sisters Country

Sisters, OR, US · May 2, 2027 (in 197 days)
Registration open 29.96 miles13.24 miles

SISU 100

Enumclaw, WA, US · June 25-27, 2027 (in 251 days)
Registration open 100 Mile

Sisu Backyard Ultra at Lake Rebecca

Rockford, MN, US · September 4, 2027 (in 322 days)
On the calendar 4.167 miles

Siuslaw Dunes

Florence, OR, US · February 27, 2027 (in 133 days)
Registration open 31 miles20.2 miles7.8 miles

Six-O Trail Run

Cleburne, TX, US · September 4, 2027 (in 322 days)
On the calendar MarathonHalf Marathon6 miles50K

Skunk Ape 100 Mile Endurance Run

Ocala, FL, US · April 24-25, 2027 (in 189 days)
Registration open 103.46 miles51.73 miles

SkunkApe 806/524/314 Trail Race

Dixon, IL, US · March 27, 2027 (in 161 days)
Registration open 33.75 miles22.5 miles13.5 miles

Sleeping Giant Trail Runs

Hamden, CT, US · April 4, 2027 (in 169 days)
Registration open 15.94 miles50K

Sleigh It (12hr / 6hr / 4.17 Miler / 12hr Relay)

Lake Wales, FL, US · December 19, 2026 (in 63 days)
Registration open 4.17 miles12 Hour Relay12 Hours6Hours

Slough & Steady

Ozawkie, KS, US · December 19, 2026 (in 63 days)
On the calendar 125 miles100K25K50K

Small Town Christmas 34 Hour

Valley, AL, US · December 5, 2026 (in 49 days)
Registration open 34Hr

Smith Rock Classic

Terrebonne, OR, US · May 29, 2027 (in 224 days)
On the calendar 51 miles30 miles9.8 miles

Snow Bull Trail Runs

Whitwell, TN, US · January 16, 2027 (in 91 days)
Registration open Half Marathon12 Hour6 Hour

Snow Mountain Ranch

Granby, CO, US · September 18, 2027 (in 336 days)
On the calendar 31.4 miles20.2 miles12.8 miles6.1 miles3.3 miles

Snow Peaks 50 Mile Trail Run

Provo, UT, US · June 12, 2027 (in 238 days)
On the calendar 50 Mile

Snowdrop ULTRA 55 Hour Race & Relay

Missouri City, TX, US · December 30 to January 1, 2027 (in 74 days)
Registration open 55 Hour

SoCal Redwood Race

Brea, CA, US · April 24, 2027 (in 189 days)
Registration open 12 Hours3 Hour6 Hours

Soil Mates Backyard Ultra

Thomaston, GA, US · February 13, 2027 (in 119 days)
Registration open 4.167 milesLast One Standing

Sombrero Ultra Running Festival ( SURF )

Middleburg, FL, US · February 12-14, 2027 (in 118 days)
Registration open 12 Hour - Day12 Hour Night24 Hours3 Hour - Saturday3 Hour - Sunday48 Hours6 Hours
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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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