Byers Peak Stampede Half Marathon & 5K
Leave the pavement behind and hit 100% unpaved roads and trails in the breathtaking Rocky Mountains—just an hour from Denver. Whether you’re tackling the Half Marathon or joining in on the 5K, you’ll enjoy challenging terrain, fresh mountain air, and jaw-dropping views at every turn. All abilities are welcome, from first-time racers to seasoned trail […]
Carkeek Cooler Trail Run
Join us for a 5k or 10k trail run at Carkeek Cooler, the first event in the 2026-27 Winter Trail Series! One perk of the Pacific Northwest’s winter drizzle is that places like Carkeek Park are lush and green, brightening up even the grayest of days. Plus, our bountiful water gives us stunning views, such as the sight of […]
Moran Constitutional Relay
The Moran Constitutional Relay is a challenging 70-mile course with 12 legs for teams of two to six runners on the breathtakingly beautiful trails of Moran State Park on Orcas Island. The park, situated in the San Juan Islands a little over three hours from Seattle, is world renowned for its scenic beauty. The relay legs tour […]
Cougar Mountain Trail Run Series #4
Thanks to runners like you, this series has raised over $250,000 for King County Parks and contributed many hundreds of hours of trail work. Join Seattle Running Club and Northwest Trail Runs in carrying this legacy forward and making this 21st annual series bigger and better than ever! Just 15 minutes from Seattle, King County’s Cougar Mountain […]
Cougar Mountain Trail Run Series #3
Thanks to runners like you, this series has raised over $250,000 for King County Parks and contributed many hundreds of hours of trail work. Join Seattle Running Club and Northwest Trail Runs in carrying this legacy forward and making this 21st annual series bigger and better than ever! Just 15 minutes from Seattle, King County’s Cougar Mountain […]
Seward Sizzler Trail Run
Situated on a peninsula surrounded by Lake Washington, Seward Park provides perhaps one of the greatest contrasts in Seattle: 100+ acres of old growth forest, just minutes from the city center. The run route follows a loop that is almost entirely in the forest, so there is ample opportunity to enjoy what the Friends of […]
Carkeek Warmer Trail Run
Carkeek is home to six miles of fun, roller-coaster trails that traverse the forest! The trails range from wide and rolling, to narrow and steep. If ever you’re feeling like the climb is tough, remember that you get to fly back down!
Cougar Mountain Trail Run Series #2
Thanks to runners like you, this series has raised over $250,000 for King County Parks and contributed many hundreds of hours of trail work. Join Seattle Running Club and Northwest Trail Runs in carrying this legacy forward and making this year’s series bigger and better than ever! Just 15 minutes from Seattle, King County’s Cougar Mountain Regional […]
Woodland Park Zoom
The Woodland Park Zoom course is a novel departure in character from many of our other events. The course has a savanna-like feel, touring the many open and lightly-wooded areas of the park, as well as looping the sports fields and traversing the trails through the more deeply-wooded ravines. The profile varies from flat, to […]
Tiger Mountain Trail Run
Tiger Mountain is the crown jewel of the Issaquah Alps, and the Tiger Mountain Trail Run will offer an excellent tour of this vast and magnificent State Forest. This event offers a quintessential Pacific Northwest trail running experience at what may be Seattle-area trail runners’ favorite playground, with fantastic and well-marked loop courses at a variety […]
The Teanaway Trail Run
It’s always sunny in Teanaway! Purchased by Washington State in 2013, Teanaway Community Forest is the first of its kind in the state of Washington. Its unique designation is meant to protect this wild forest land while giving local groups a say in the land’s management and is a testament to the passion that outdoor […]
Ravenna Run the Ravine
Nestled just north of the University District, Ravenna Park is a forest-filled ravine that serves as a green retreat for city dwellers. According to Seattle Parks & Recreation, a local realtor named Ravenna Park after “an Italian seacoast town that was famous for its pine trees, where poets, warriors, and statesmen once strolled in a […]
Rattlesnake Ridge Run
Come experience Rattlesnake Ridge! This well-loved single-track gem of the eastern Issaquah Alps divides the Snoqualmie River Valley from the vast Cedar River Watershed. The course features a climb through diverse forest types and peekaboo views of the Snoqualmie Valley.
Cougar Mountain Trail Series #1
Thanks to runners like you, this series has raised over $250,000 for King County Parks and contributed many hundreds of hours of trail work. Join Seattle Running Club and Northwest Trail Runs in carrying this legacy forward and making this 21st annual series bigger and better than ever! Just 15 minutes from Seattle, King County’s Cougar Mountain […]
Cat’s Tail Marathon
The Cat’s Tail Marathon is an approximately 26 mile point to point trail race in the Slide Mountain Wilderness Area of the Catskills, hilly, rugged and technical. The course summits four Catskills High Peaks – Panther, Slide, Cornell, and Wittenberg Mountains, as well as Giant Ledge, Cross Mtn, Mount Pleasant, and Romer Mtn, with almost […]
Winter Park Trail Runs
Winter Park 50K-21K-10K The Winter Park Trail Runs deliver high-alpine racing at its best, featuring flowing singletrack, rugged mountain terrain, and expansive views from start to finish. Starting in the mountains and finishing in the heart of town, these courses capture the adventure, challenge, and welcoming mountain-town atmosphere that define Winter Park, CO.
Christina Bohn Memorial 5K for PMDD Awareness
Join us in Columbia Missouri on Saturday, October 17th, 2026, for the 3rd annual Christina Bohn Memorial 5K for PMDD Awareness! We have in-person and virtual options for registration. The 5K is timed and is on a trail that includes the MKT and conservation land. Medals will be given to the top three finishers in […]
Parallel of Latitude 8-Hour Endurance Race
The Parallel of Latitude is an 8-hour fixed time race featuring a 3.45-mile out-and-back on a flat, scenic rail trail next to beautiful Dryden Lake. From the time the clock starts at 8:00 AM, to the time it stops at 4:00 PM, how many miles you complete is up to you. This low-key, flat race […]
Vashon Ultramarathon & Trail Run
10 mile, 20 mile, 50k: Welcome back runners for the 16th year of trail running on Vashon Island! This year we introduce Team Competitions! Three team members add up their finish times to find out how they compare – three categories: Female, Male and Mixed. Teams must have a Team Captain to add their team’s […]
Girl Scout Island Ultra and Feathers 10K
Welcome to the first Official Girl Scout Island Ultramarathon! We are all here to SUPPORT, INSPIRE, and EMPOWER athletes of all ages to find their potential. Although anyone is welcome to participate we will place emphasis on empowering strength, perseverance and discovering new challenges for young women everywhere. Savannah, Georgia is the birthplace of the […]
