Ultra races in United States — 2026 running calendar

Wolverine State 100

Petoskey, Michigan, United States

10 Oct, 2026 (Sat) – 11 Oct, 2026

$60.00 - $335.00

Trail running, Running

Ultra +3

CanLake Ultras

Canandaigua, New York, United States

10 Oct, 2026 (Sat)

Free - $400.00

Trail running, Running

Ultra 24.1K

2026 RAT 1000 and Mini RAT

Texarkana, Arkansas, United States

10 Oct, 2026 (Sat)

Free

Running, Cycling, Gravel biking

Ultra

Ruth Anderson Memorial Endurance Run

San Francisco, California, United States

10 Oct, 2026 (Sat)

Free

Trail running, Running

Ultra 7.2K

Le Grizz Ultramarathon & Relay

Polebridge, Montana, United States

10 Oct, 2026 (Sat)

$35.00 - $150.00

Trail running, Running

Ultra 15K 5K

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

Glen Rose, Texas, United States

10 Oct, 2026 (Sat) – 11 Oct, 2026

Free - $155.00

Trail running, Running

Ultra 25K 10K 5K +3

The Big BO 50k

Indianapolis, Indiana, United States

10 Oct, 2026 (Sat)

$30.00 - $80.00

Running

Ultra 25K 10K 5K

Oil Creek 100 Trail Runs

Titusville, Pennsylvania, United States

10 Oct, 2026 (Sat) – 11 Oct, 2026

$70.00 - $285.00

Trail running

25K Ultra

Love Never Ends Trail Run

Atoka, Oklahoma, United States

10 Oct, 2026 (Sat) – 11 Oct, 2026

$65.00 - $175.00

Trail running

Ultra 5K +4

Bizz Johnson

Susanville, California, United States

11 Oct, 2026 (Sun)

$65.00 - $100.00

Running

Ultra Half-Marathon 10K

2026 HARRA Warm-Up Series Bundles

Houston, Texas, United States

11 Oct, 2026 (Sun)

$210.00 - $285.00

Running

Ultra 41K

Cannonball Running Festival - Marathon, Half Marathon, 10K & 5K

Greensboro, North Carolina, United States

16 Oct, 2026 (Fri) – 17 Oct, 2026

$35.00 - $130.00

Running

5K 47.2K 26.1K 15K +3