Half-Marathon races in Washington, United States — 2026 running calendar

Evergreen Half and 5 Mile

Snohomish, Washington, United States

23 May, 2027 (Sun)

$55.00 - $70.00

Running

Half-Marathon 8K

Run the 509

Deer Park, Washington, United States

31 May, 2026 (Sun)

Running

Half-Marathon 10K 5K

Echo Valley

Chelan, Washington, United States

30 May, 2026 (Sat)

Trail running, Running

10K Half-Marathon Ultra 1.6K +3

Big River Race

Pasco, Washington, United States

30 May, 2026 (Sat)

Running

Half-Marathon 10K 5K 1.6K +1

Spring - Mud Mountain Dam Marathon & Half Marathon

Enumclaw, Washington, United States

30 May, 2026 (Sat)

Running

Marathon Half-Marathon

Memorial Day Run 5K/10K/13.1 SEATTLE

Seattle, Washington, United States

23 May, 2026 (Sat)

Running

5K 10K Half-Marathon 1.6K +2

Luau 5K, 10K, & 13.1M at Spokane, WA (21)

Spokane, Washington, United States

23 May, 2026 (Sat)

Running

5K 10K Half-Marathon

Luau 5K, 10K, & 13.1M at Camas, WA (21)

Camas, Washington, United States

23 May, 2026 (Sat)

Running

5K 10K Half-Marathon

Run for Mental Health 5K/10K/13.1 SEATTLE

Seattle, Washington, United States

23 May, 2026 (Sat) – 14 Nov, 2026

$30.00 - $45.00

Running

5K 10K Half-Marathon 1.6K +14

Luau 5K, 10K, & 13.1M at Olympia, WA (21)

Olympia, Washington, United States

23 May, 2026 (Sat)

Running

5K 10K Half-Marathon

Windermere Marathon

Spokane, Washington, United States

17 May, 2026 (Sun)

Running

Marathon Half-Marathon 10K 5K +3

Reflection Run

Washougal, Washington, United States

17 May, 2026 (Sun)

Running

Half-Marathon 10K 5K +2