10K races in United States — 2026 trail running calendar

Oct

17

Galveston Ultra Trail

Galveston, Texas, United States

Trail running Running Walking

Ultra Half-Marathon 10K 5K +4

Oct

11

Arc'Teryx Run Boston

Milton, Massachusetts, United States

Trail running

10K

Oct

11

Bizz Johnson

Susanville, California, United States

Running

Ultra Half-Marathon 10K

Oct

11

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

Saint Petersburg, Florida, United States

Trail running Running Swimming

5K 2.5K 1K 10K +7

Oct

10

Feed My Starving Children 5k/10k

Birmingham, Alabama, United States

Trail running

5K 10K

Oct

10

Trailway Trail Race

Somerville, Texas, United States

Trail running

Ultra Marathon Half-Marathon 10K +4

Oct

10

Into the Woods Six Miler

Erie, Pennsylvania, United States

Trail running

9.7K

Oct

10

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

Glen Rose, Texas, United States

Trail running Running

Ultra 25K 10K 5K +3

Oct

10

Sandhill Crane All Trail Half Marathon/10K/5K

Vandalia, Michigan, United States

Trail running Running

Half-Marathon 10K 5K 1K

Oct

10

Rock It in Chino Hills 5K & 10K

Brea, California, United States

Trail running

5K 10K

Oct

10

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

Saint Petersburg, Florida, United States

Trail running Running Swimming

5K 2.5K 1K 10K +10

Oct

10

Queen City Trail Run

Weslaco, Texas, United States

Trail running Running

16.1K 10K 5K 1.6K +1