When in May are most half marathons held?
The busiest weekend in Washington is May 8 and May 9, with 5 of them, 4 of those on Saturday, May 8. Every one of them is on a Saturday or a Sunday.
Race calendar · May 2027 · Washington
Half Marathons in Washington in May 2027
Every Half Marathon in Washington in May 2027, all 17 of them, sorted by date. Dates, entry fees, finish-time stats from past results, and start-line maps.
What the field actually runs
May Half Marathons, By the Numbers
2:11:03Median finish time
1:25:35Median winning time
213Median field size
9May half marathons with published results
How we calculate these stats: RunSesh calculates these figures from the most recent published results of past editions, sourced from RunSignup. We show aggregates only: field size, winning and median times, and the cutoff. We never publish individual finisher tables. Last updated Nov 12, 2026.
When in May
The May Race Weekends
Half marathons are not spread evenly across May. Here is how the calendar actually falls, weekend by weekend, which is the part worth knowing before you book a trip or plan a taper around one.
By the numbers
The Biggest Field
The largest field of any May Half Marathon in Washington, from the most recent published results.
Washington Half Marathons by City in May
All Half Marathons in Washington in May
17 total Sat, May 1, 2027Tacoma City Marathon / Half / Ghost / 10K / 5K / 1K Tacoma, WAFrom $100Details Sat, May 1, 2027Luau 5K, 10K, & 13.1M at Everett, WA (18) Everett, WAFrom $65Details Sun, May 2, 2027Kirkland Half Marathon & 5K Kirkland, WAFrom $98Details Sat, May 8, 2027San Juan Island Half Friday Harbor, WAFrom $118Details Sat, May 8, 2027Snohomish Women's Run Everett, WAFrom $102Details Sat, May 8, 2027Medal Madness 5K, 10K, & 13.1M at Everett, WA (19) Everett, WAFrom $65Details Sat, May 8, 2027Run for Chocolate 5k/10k/13.1 SEATTLE Seattle, WAFrom $45Register Sun, May 9, 2027Super Mom 5K/10K/Half Marathon - Portland (Washougal) Washougal, WARegistration opens Mar 11, 2027From $55Details Sat, May 15, 2027Pirate 5K, 10K, 13.1M at Vancouver, WA (20) Vancouver, WAFrom $65Register Sun, May 16, 2027Capital City Marathon Olympia, WAFrom $70Details Sun, May 16, 2027Windermere Marathon Spokane, WAFrom $100Details Sun, May 16, 2027Annie Curtis Half Marathon & 5K Anacortes, WARegistration opens Jan 4, 2027From $60Details Sun, May 23, 20272027 Evergreen Half and 5 Mile Snohomish, WAFrom $70Details Sat, May 29, 2027Big River Race Pasco, WARegistration opens Dec 31From $55Details Sat, May 29, 2027Spring - Mud Mountain Dam Marathon & Half Marathon Enumclaw, WAFrom $105Details Sat, May 29, 2027SuperHeroes Run SEATTLE Seattle, WAFrom $45Register Sat, May 29, 2027Medal Madness 5K, 10K, 13.1M at Vancouver, WA (22) Vancouver, WAFrom $65Register
Common Questions About Running a May Half Marathon in Washington
What is a good Half Marathon time?
Across the 9 of these May half marathons with published results from past editions, the median finisher ran 2:11:03, and the median winning time was 1:25:35. So anything under 2:11:03 puts you in the faster half of a typical field. That is the middle of these RunSignup fields, walkers and charity entrants included, not a national average.
How big is a typical May Half Marathon field?
The median one finished 213 runners, across the 9 of these May half marathons with published results from past editions. Most are far smaller than the big-city events people picture, which means less crowding at the start and a friendlier field, with a last recorded finisher at 3:44:52.