Lake Sammamish Half
Redmond, Washington, United States
Mar, 2027 (TBD)
Half-marathon
Race Information
The Lake Sammamish Half Marathon is a point to point race that takes runners along the smooth trail connecting Marymoor Park in Redmond to Lake Sammamish State Park in Issaquah. This interurban trail is very popular with runners. Approximately 30% of the course will be on smooth gravel surface and 70% on pavement. You can also enter the half-marathon walk category with a generous 4 hour time limit. This flat run is perfect for a half-marathon personal best whether you’re running or walking!
Related Events
The Great Ferry Race
Date: Jun 7, 2026 - Sunday
Size: 500 - 1,000 participants
Location: Bainbridge Island, Washington
Snoqualmie Valley Half
Date: Jun 20, 2026 - Saturday
Size: 500 - 1,000 participants
Location: Carnation, Washington
Craft Classic
Date: Aug 2, 2026 - Sunday
Size: 500 - 1,000 participants
Location: Redmond, Washington
Iron Horse Half
Date: Aug 30, 2026 - Sunday
Size: 500 - 1,000 participants
Location: North Bend, Washington
Orca Half
Date: Sep 19-20, 2026 - Saturday to Sunday
Size: 1,000 - 5,000 participants
Location: Seattle, Washington
Poulsbo Half & 10K
Date: Oct 4, 2026 - Sunday
Size: 500 - 1,000 participants
Location: Poulsbo, Washington
Lake Washington Half
Date: Oct 17, 2026 - Saturday
Size: 500 - 1,000 participants
Location: Kirkland, Washington
Captain Jack's Treasure Run
Date: Oct, 2026 (TBD)
Size: 500 - 1,000 participants
Location: Redmond, Washington
Electric Cookie Run
Date: Dec, 2026 (TBD)
Size: 100 - 500 participants
Location: Seattle, Washington
My Better Half Marathon
Date: Feb, 2027 (TBD)
Size: 500 - 1,000 participants
Location: Seattle, Washington
Lake Sammamish Half
Date: Mar, 2027 (TBD)
Size: 500 - 1,000 participants
Location: Redmond, Washington
Run The Green
Date: Mar, 2027 (TBD)
Size: 500 - 1,000 participants
Location: Kent, Washington
Birch Bay Road Race
Date: Apr, 2027 (TBD)
Size: 100 - 500 participants
Location: Blaine, Washington
San Juan Island Half
Date: May, 2027 (TBD)
Size: 100 - 500 participants
Location: Friday Harbor, Washington
Oceanside Mother's Day 10K Run & 5K Run/Walk
Date: May, 2027 (TBD)
Size: 100 - 500 participants
Location: Qualicum Beach, British Columbia
Downhill Super Series 🪽
3 of the Fastest Boston Qualifier Courses in the U.S.
#22 Fastest | #35 Fastest | #5 Fastest 🇺🇸
Boston Marathon qualifying eligible with no downhill penalty! Marathon and half marathon distances un through the iconic Snoqualmie Tunnel.
💸 SAVE 10% | Choose Your Event | Use Code: RG10
🪽 Super Hyak Marathon & Half - June 13th
🌲 Jack & Jill Marathon & Half - July 25 & 26th
⛰️ Cascade Express Marathon & Half - Sept. 12th
These smooth rail-trail courses feature sustained net downhill profiles designed to help runners chase personal bests and Boston Qualifying times. Located along the Palouse to Cascades Trail, this historic rail tunnel offers cool temperatures and a unique running experience before the course continues downhill toward the finish.
🏃 Training for This Race?
Get a personalized training plan that adapts for every run. RunDot analyzes every run and automatically adjusts your training plan.
🎁 2 weeks free for RunGuides runners
🏃 Looking For More Runs Near Seattle?
Find another distance:
Race Facts
Race Size: 500 - 1,000
Course Type: Trail
Boston Qualifier: No
Kids Run: No
Where to Stay
Use this map to find hotels and airbnb accommodation near this race location.
