Run under the stars on the Bonneville Salt Flats from dusk to dawn in this unique ultra or relay. Challenge your limits and enjoy all-night activities.

• Fun
• Scenic
• Competitive
• Quirky
• For a Cause

Fri, Sep 4, 2026, 8:02 PM MDT·50 Miles·Wendover, UT

Serious TestULTRA

Course · Hilly · Timed race

Better for experienced runners ready for a demanding trail effort.

Sat, Sep 12, 2026, 7:00 AM MDT·13.1 Miles·Bellvue, CO

Serious TestRUN

Course · Mixed · Hilly · Family-oriented

A challenging trail run through stunning Olympic Peninsula landscapes, culminating in a festive lakeside finish and supporting local trails.

• Fun
• Scenic
• Competitive
• Festive

Better for experienced runners ready for a demanding trail effort.

Sun, Sep 20, 2026, 6:00 AM MST·3.1 Miles, 9.3 Miles·Tucson, AZ

Serious TestTRAIL

Course · Trail · Hilly · Walkers welcome

Better for experienced runners ready for a demanding trail effort.

Sun, Sep 20, 2026, 9:00 AM MDT·18.2 Miles·Pray, MT

Serious TestTRAIL

Course · Trail · Hilly

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

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

Better for experienced runners ready for a demanding trail effort.

Thu, Dec 3, 2026, 8:30 AM MST·13.1 Miles, 26.2 Miles·Teec Nos Pos, AZ

Serious TestRUN

Course · Trail · Hilly · Timed race

Better for experienced runners ready for a demanding trail effort.

Sat, Jan 9, 2027, 7:30 AM CST·1 Miles, 25K, 50K, 100K·Bandera, TX

Serious TestTRAIL

Course · Trail · Hilly

Better for experienced runners ready for a demanding trail effort.

Sat, Mar 13, 2027, 8:00 AM MST·2 Miles, 13.1 Miles, 26.2 Miles·Salida, CO

Serious TestTRAIL

Course · Trail · Hilly