The Legacy of Mercer Island Half Marathon

45+ Years of Community, Charity, and Running Excellence in the Pacific Northwest

Explore Our Running Resources

Welcome to the comprehensive resource celebrating the annual charity half marathon's rich 45+ year history while serving as the premier guide for Pacific Northwest running. This site honors the legacy of a beloved community event that raised millions for colon cancer awareness while providing modern runners with training guides, race information, and local running resources.

45+

Years of History

3,000+

Peak Participants

13.1

Miles of Excellence

$1M+

Raised for Charity

A Storied Pacific Northwest Running Tradition

Runners crossing the Mercer Island Half Marathon finish line with Lake Washington in background

Founded by local community leaders, the annual charity half marathon evolved from a small community race into one of the Seattle area's premier running events, attracting over 3,000 participants at its peak. The scenic Lake Washington course wound through the beautiful neighborhoods of Mercer Island, offering runners stunning waterfront views and a supportive community atmosphere.

What made this event truly special was its family-friendly nature, featuring multiple distances including the half marathon, 10K, 5K, and Kids Run. For more than four decades, this race brought together runners of all ages and abilities, from elite athletes chasing personal records to charity runners supporting important causes.

The race's impact on the local running community extended far beyond race day. It fostered connections, inspired thousands to pursue their running goals, and created lasting memories for participants and volunteers alike. Today, we honor that legacy while continuing to serve the Pacific Northwest running community.

Learn more: Rotary International | Road Runners Club of America

Running for Colon Cancer Awareness

The annual charity half marathon became more than just a race—it became a powerful vehicle for colon cancer prevention and awareness through a dedicated fundraising initiative. This community-driven program raised funds for screening programs, research, and prevention education, making a significant impact over more than a decade.

Through this charitable initiative, the running community came together to make a real difference. Thousands of participants ran with purpose beyond personal achievement, knowing that every mile contributed to saving lives through early detection and prevention. The initiative funded colon cancer screening programs, supported research, and raised awareness about the importance of preventive care.

Colon cancer is highly preventable when caught early through screening. Regular screening beginning at age 45 can detect polyps before they become cancerous. Physical activity, including running, reduces colon cancer risk by 30-40%. The legacy of this race continues through education and awareness, encouraging everyone to prioritize screening and maintain an active lifestyle.

Important resources: American Cancer Society | Colorectal Cancer Alliance

Runner wearing blue colon cancer awareness ribbon on race bib

Your Pacific Northwest Running Resource Hub

Aerial view of scenic running trail along Lake Washington waterfront on Mercer Island

While honoring the past, this site serves as your comprehensive resource for Pacific Northwest running. Whether you're training for your first 5K or your tenth half marathon, we provide the guidance and information you need to succeed.

Training Guides

Proven training plans for 5K, 10K, and half marathon distances. From beginner-friendly programs to advanced strategies, find the plan that fits your goals.

Start Training

Local Routes

Discover the best running routes on Mercer Island and throughout the Seattle Eastside. Scenic waterfront trails, challenging hills, and peaceful loops.

Explore Routes

Race Calendar

Stay updated on half marathons, 10Ks, 5Ks, and charity races throughout the Pacific Northwest. Plan your racing season year-round.

Find Races

Nutrition Tips

Master running nutrition with expert guidance on fueling, hydration strategies, and race day nutrition for optimal performance.

Learn More

Charity Running

Learn how to run for causes that matter, fundraising strategies, and join charity race teams making a difference through running.

Get Involved

Running Community

Find running clubs, group workouts, and community connections across Mercer Island, Seattle, and the greater Eastside area.

Join Community

Additional resources: USA Track & Field

Pacific Northwest Running Culture

The Pacific Northwest has cultivated a unique running culture shaped by its stunning natural environment and supportive community spirit. From the early morning trail runners on Tiger Mountain to the lakefront joggers circling Green Lake, running is woven into the fabric of our region's lifestyle.

Year-Round Running Weather

While Seattle's reputation for rain might deter fair-weather runners, locals embrace the "there's no bad weather, only bad gear" mentality. Cool temperatures year-round create ideal running conditions—no sweltering summer heat, just consistent mild weather that supports consistent training.

Trail Access and Natural Beauty

Few metropolitan areas offer the trail access that Seattle provides. Within 30 minutes of downtown, runners can access hundreds of miles of forest trails, waterfront paths, and mountain routes. This connection to nature elevates running from exercise to experience.

Community Support

The Pacific Northwest running community is known for its welcoming, inclusive spirit. Whether you're running a 12-minute or 6-minute mile, you'll find your people here. Running clubs, group workouts, and volunteer-supported races create a culture where everyone belongs.

Local Running Legends

Our region has produced Olympic marathoners, Boston Marathon champions, and countless age-group record holders. But more importantly, it's created millions of stories of ordinary people achieving extraordinary personal goals through running.

Environmental Stewardship

Pacific Northwest runners tend to be environmentally conscious, often combining their love of running with trail maintenance, park clean-ups, and advocacy for protected open spaces. Running here means being a steward of the trails we enjoy.

The Legacy Continues

While the Mercer Island Half Marathon may be part of history, its spirit lives on through the hundreds of local races, thousands of active runners, and the enduring commitment to community health and charitable giving that defines Pacific Northwest running culture.

Ready to Start Your Running Journey?

Whether you're a former Mercer Island Half Marathon participant or new to the Pacific Northwest running community, we're here to support your goals. Explore our comprehensive training resources, discover local routes, and connect with fellow runners.