Marathon races in United States — 2026 trail running calendar

Apr

24

Pandora's Box of Rox

Burnet, Texas, United States

$10.00 - $138.00

Trail running

Ultra Marathon Half-Marathon 12.9K +2

Apr

24

SPASM Lake Chabot Trail Run

Castro Valley, California, United States

Free - $90.00

Trail running Running

8K Half-Marathon 28.8K Marathon +2

Apr

24

MileBuilt Lake Louisa State Park 2-Day Challenge

Clermont, Florida, United States

$35.00 - $85.00

Trail running Running

Ultra Marathon Half-Marathon 10K +6

Apr

24

Mo Spring

Perrysville, Ohio, United States

$50.00 - $85.00

Trail running

Marathon Half-Marathon 15K

May

01

The Bluffs Trail Runs

Eminence, Missouri, United States

$15.00 - $115.00

Running Trail running

Marathon Half-Marathon 15K 10K +4

May

01

Run Happy 50K (and other happy distances)

South Bend, Indiana, United States

$40.00 - $55.00

Trail running

10K Half-Marathon Marathon Ultra

May

01

Texas Switchback

Johnson City, Texas, United States

$45.00 - $99.00

Trail running

5K 16.4K Half-Marathon Marathon

May

08

Grizzly Peak Trail Run

Berkeley, California, United States

Free - $90.00

Trail running Running

10K Half-Marathon 30K Marathon +3

May

08

F^3 Cap Sauers Trail Marathon & 10 Mile

Palos Hills, Illinois, United States

$75.00 - $95.00

Trail running

Marathon 16.1K

May

15

Pechanga Trail Run

Spicewood, Texas, United States

$10.00 - $130.00

Running Trail running

Ultra Marathon Half-Marathon 10K +2

May

23

Diablo Trail Run

Clayton, California, United States

Free - $90.00

Trail running Running

6.4K 16.1K Half-Marathon Marathon +3

May

29

Fools

Peninsula, Ohio, United States

$40.00 - $85.00

Trail running

Ultra Marathon Half-Marathon 10K