Trail running Race Calendar

The Mammoth 2026 - 100K / 50K / 25K / 10K / 5K and Mighty Mammoth 1K Fun Run

Glen Rose, Texas, United States

Oct 10, 2026 (Sat) – Oct 11, 2026

Free - $155.00

Trail running, Running

Ultra 25K 10K 5K +3

Unity Beach Swim - Aquathlon & Run Training Races (October)

Saint Petersburg, Florida, United States

Oct 11, 2026 (Sun)

$30.00 - $75.00

Trail running, Running, Swimming

5K 2.5K 1K 10K +7

Rick O'Donnell Memorial 5 Mile Trail Run and Ultra Challenge

Mount Airy, Maryland, United States

Oct 11, 2026 (Sun)

$45.00

Trail running

8K

Oak Park Challenge - 7 Mile Trail Run

Huntsville, Alabama, United States

Oct 11, 2026 (Sun)

$40.00

Trail running

11.3K

Scary Rat Race

Farmingdale, New Jersey, United States

Oct 11, 2026 (Sun)

$30.00

Trail running

6.4K

Bizz Johnson

Susanville, California, United States

Oct 11, 2026 (Sun)

$75.00 - $110.00

Running

Ultra Half-Marathon 10K

Paine to Pain Trail Half Marathon

New Rochelle, New York, United States

Oct 11, 2026 (Sun)

$65.00

Trail running

Half-Marathon

Rocky Gap 25K, 50K, Relay Trail Run

Flintstone, Maryland, United States

Oct 11, 2026 (Sun)

$50.00 - $100.00

Trail running

25.9K Ultra

Little Rooster Run

Glencoe, Kentucky, United States

Oct 16, 2026 (Fri) – Oct 20, 2026

$40.00 - $130.00

Running, Trail running

5K Ultra

Sunshine Camp Trail Mix & Beer Fest

Rush, New York, United States

Oct 16, 2026 (Fri)

$20.00 - $35.00

Trail running

5K

Silver Falls 5K Trail Run

Silverton, Oregon, United States

Oct 16, 2026 (Fri)

Trail running

5K

BadgerPalooza

Williamstown, New Jersey, United States

Oct 16, 2026 (Fri) – Oct 17, 2026

$90.00 - $240.00

Trail running

Ultra 30K +3