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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.

Bell Ringer Trail Run

Montgomery Bell State Park, TN, US · December 12, 2026 (in 57 days)
Registration open 15K25K50K

Berkeley Trail Adventure

Berkeley, CA, US · September 12, 2026 (34 days ago)
Ran · this year's race is done. 31 miles21.6 miles13 miles6 miles

Big Bend Ultra

Terlingua, TX, US · January 17-18, 2027 (in 93 days)
Registration open 100K55K35K20K10K

Big Burro 24HR

Big Bear City, CA, US · April 30 to May 1, 2027 (in 196 days)
Registration open 24hrs

Big Texas Ultra

Johnson City, TX, US · November 6-7, 2026 (in 21 days)
Registration open 50K9.41 miles100K15K

Big's Backyard Ultra

Bell Buckle, Tennessee, US · October 16, 2027 (in 365 days)
On the calendar The Yard – Individual World Championship

Bigfoot 200

Cougar, WA (start) / Randle, WA (finish), US · August 13-17, 2027 (in 301 days)
Waitlist only 200.1 miles

Bigfoot Forrest Trail 10 Hour Fun Run

Cape Girardeau, MO, US · October 17, 2026 (tomorrow)
Full 3 miles10hrs

Bighorn Trail Run 100 Mile

Dayton, WY, US · June 19-20, 2026 (119 days ago)
Ran · this year's race is done. 100 Mile

Black Barn 200

Bonney Lake, WA, US · September 4-8, 2026 (42 days ago)
Registration open 200 miles

Black Canyon Ultras

Mayer, AZ (start) / New River / Black Canyon City, AZ (finishes), US · February 13-14, 2027 (in 120 days)
Registration open 62.2 miles32.2 miles

Black Copperhead Sting 50k

Belmont, NC, US · August 14, 2027 (in 302 days)
Registration open 3.51 miles25K50K

Black Forest Ultra

North Bend, PA, US · October 3, 2027 (in 352 days)
Scheduled 63.8 miles

Black Gold 24hr and 12hr Endurance Challenge

Belfry, KY, US · November 21-22, 2026 (in 36 days)
Registration open 12 hrs Relay12hr individual12hr Ruck24 Hour24 Hour Relay24hr Rucksack

Black Hills 100

Sturgis, SD, US · June 25-26, 2027 (in 252 days)
Registration open 100 Mile50 Mile30K50K

Black Hills Backyard Ultra

Spearfish, SD, US · September 12, 2026 (34 days ago)
Ran · this year's race is done. Backyard

Black River Trail Classic

Millston, WI, US · October 17, 2026 (tomorrow)
Registration open 30.85 miles15.12 miles6.26 miles85K

Black Toe Run

Watertown, TN, US · January 30-31, 2027 (in 106 days)
Registration open 12HR2 Person 24 Hour Team24HR24HR 4 Person Relay24HR RUCK48HR SOLO | Alone for 1248HRS RUCK

Blacks Grove Backyard Ultra Presented by Agony of DeFeet Wadena Run Club

Wadena, MN, US · May 29, 2027 (in 225 days)
Registration open 4.167 milesBackyard Ultra

Bleak Midwinter Endurance Run

Springfield, MO, US · January 23, 2027 (in 99 days)
Registration open 1 Hour12 Hour3 Hour6 Hour

Blood Rock 100

Pelham, AL, US · December 4-6, 2026 (in 49 days)
Registration open 102.38 miles51.19 miles31.18 miles16.62 miles

Blood Root Ultra

Pittsfield, VT, US · May 5-8, 2027 (in 201 days)
Registration open 200 miles100 Mile50 Mile31.09 miles10.13 miles

Bloomfield Backyard Ultra

Bloomfield, KY, US · November 28, 2026 (in 43 days)
Registration open Backyard Ultra

Blue Hill Mountain Trail Fest

Blue Hill, ME, US · August 7, 2027 (in 295 days)
On the calendar 10K25K50K5K

Blue Ridge Ultra

Blue Ridge, GA, US · October 17, 2026 (tomorrow)
Postponed 30.28 miles15K30K
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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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