Endurance Race Calendar May

Chicagoland Spring Marathon, Half Marathon & 10K

Schaumburg, Illinois, United States

May 3, 2026 (Sun)

Running

Marathon Half-Marathon 10K +5

Lucky Paws Animal Assistance Annual “Wag through the Pines” Doggie Walk/Run

Hammonton, New Jersey, United States

May 3, 2026 (Sun)

Walking, Running

1.6K 4.8K

Lucky Loop - 5K

Royal Oak, Michigan, United States

May 3, 2026 (Sun)

Running

5K

Chelsea Test 05-04-25

Lapel, Indiana, United States

May 3, 2026 (Sun)

Running

Marathon Half-Marathon 5K

Chasing the Rainbows Bursting Bubble Awareness Walk — Ypsilanti, MI

Ypsilanti, Michigan, United States

May 3, 2026 (Sun)

Walking

5K

Chasing the Rainbows Bursting Bubble 5K Walk & Run — York, PA

York, Pennsylvania, United States

May 3, 2026 (Sun)

Running

5K

Chasing the Rainbows Bursting Bubble 5K Walk & Run — Everett, WA

Everett, Washington, United States

May 3, 2026 (Sun)

Running

5K

Emerge 5K

Boulder, Colorado, United States

May 3, 2026 (Sun)

Running

5K

Chasing the Rainbows Bursting Bubble 5K Walk & Run — East Islip, NY

East Islip, New York, United States

May 3, 2026 (Sun)

Running

5K

2026 J-Hawk Earlybird Race Series: Duathlon, Triathlon (Olympic, Sprint, & SuperSprint), AquaBike (Oly & Sprint)

Whitewater, Wisconsin, United States

May 3, 2026 (Sun)

Triathlon

27.4K

Chasing the Rainbows Bursting Bubble 5K Walk & Run - VIRTUAL

Anywhere, United States

May 3, 2026 (Sun) – May 30, 2026

Running

5K

Healthy Kids Running Series Spring 2026 - Windham, NH

Windham, New Hampshire, United States

May 3, 2026 (Sun) – Jun 7, 2026

Running

6.4K 3.2K 1.6K +1