Run through the unique macadamia nut and coffee fields of Hawaii in this trail event, offering distances from 5K to a highly challenging 50K.

• Scenic
• Competitive

Sun, Sep 20, 2026, 6:30 AM HST·5K, 10K, 13.1 Miles, 50K·Pahala, HI

Serious TestTRAIL

Course · Trail · Hilly · Timed race

Run through the stunning Jackson Hole Valley to the Teton Mountain Range, then celebrate your accomplishment at a lively Oktoberfest.

• Scenic
• Festive

Better for experienced runners ready for a demanding trail effort.

Sat, Sep 26, 2026, 9:00 AM PDT·10K, 13.1 Miles, 26.2 Miles·Taft, MT

Serious TestTRAIL

Course · Trail · Hilly

Better for experienced runners ready for a demanding trail effort.

Sat, Oct 3, 2026, 7:00 AM MDT·1K, 3.1 Miles, 5K, 13.1 Miles, 26.2 Miles·Colorado Springs, CO

Serious TestRUN

Course · Mixed · Hilly · Timed race

Better for experienced runners ready for a demanding trail effort.

Sat, Oct 3, 2026, 7:30 AM MDT·5K, 10K, 8 Miles, 13.1 Miles·Canon City, CO

Serious TestRUN

Course · Trail · Hilly · Family-oriented

Experience high-altitude trail running in Arizona's Coconino National Forest, supporting college cross country programs.

• Scenic
• For a Cause

Better for experienced runners ready for a demanding trail effort.

Sun, Oct 4, 2026, 10:00 AM MDT·6.2 Miles, 13.1 Miles·Red Lodge, MT

Serious TestRUN

Course · Mixed · Hilly · Walkers welcome

• Inaugural

Sun, Oct 11, 2026, 8:00 AM MDT·13.1 Miles, 26.2 Miles·Durango, CO

Serious TestRUN

Course · Road · Hilly · Timed race

Better for experienced runners ready for a demanding trail effort.

Fri, Oct 16, 2026, 8:00 PM EDT·800m, 5K, 100 Miles·Glencoe, KY

Serious TestULTRA

Course · Trail · Hilly · Family-oriented

Better for experienced runners ready for a demanding trail effort.

Sat, Oct 17, 2026, 7:30 AM EDT·12K, 25K, 50K·Emporium, PA

Serious TestULTRA

Course · Trail · Hilly

Better for experienced runners ready for a demanding trail effort.

Sat, Oct 17, 2026, 7:00 AM CDT·1 Miles, 5K, 10K, 13.1 Miles, 26.2 Miles, 50K·Burnet, TX

Serious TestTRAIL

Course · Trail · Hilly

Run the Texas coast on Galveston Island, where miles of open beach, Gulf Coast sunrises, and a lively festival await.

• Fun
• Scenic
• Quirky
• Festive

Better for experienced runners ready for a demanding trail effort.

Sat, Oct 17, 2026, 8:00 AM PDT·3.1 Miles, 6.2 Miles, 13.1 Miles·Cool, CA

Serious TestTRAIL

Course · Trail · Hilly · Family-oriented

Conquer Missoula's mountains on this challenging 33-mile trail ultra, featuring over 8,000 feet of elevation gain and stunning open space views.

• Scenic

Sun, Oct 18, 2026, 7:00 AM MDT·17 Miles, 33 Miles·Missoula, MT

Serious TestULTRA

Better for experienced runners ready for a demanding trail effort.

Fri, Oct 23, 2026, 4:00 PM CDT·1 Miles, 5 Miles, 25 Miles, 50 Miles, 100 Miles·Bandera, TX

Serious TestTRAIL

Course · Trail · Hilly

Better for experienced runners ready for a demanding trail effort.

Sat, Oct 24, 2026, 7:30 AM MST·3.1 Miles, 5K, 13.4 Miles, 26.8 Miles·Grand Canyon Village, AZ

Serious TestRUN

Course · Mixed · Hilly · Timed race

Experience the beauty and challenge of Hixon Forest with scenic trail runs from 5K to a 50K ultra, featuring stunning Mississippi River views.

• Fun
• Scenic

A challenging 100K or 50K ultra on Wisconsin's scenic Ice Age Trail, featuring stunning fall colors and a unique, custom-branded wooden finisher medal.

• Scenic
• Quirky
• Festive