2025 Marathons

August 2025 Marathons

Your complete August 2025 marathon calendar. Find every marathon happening in August 2025 with comprehensive race details, registration information, and official results, including the Point Mariah Trail Marathon (California), Boulder Rez Marathon (Colorado), and Moorehead Park Trail Mazathon (Iowa).

Each marathon listing includes a 2025 marathon guide including dates, locations, course details, weather conditions, and relevant links for registration and more information. We maintain the most current results database, publishing official results on race day, plus complete 2024 results for year-to-year comparison.

Moorehead Park Trail Mazathon

Ida Grove, Iowa

August 2, 2025

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The Moorehead Park Trail Mazathon in Ida Grove, Iowa, challenges runners with its scenic 26.2-mile course featuring single-track dirt trails and mowed meadow paths, demanding both endurance and agility through a total climb of 3,000 feet. This marathon offers a unique blend of historical intrigue and natural beauty, as participants pass landmarks like old stagecoach trails and a one-room schoolhouse, all while enjoying robust race support and the self-reliance of carrying their own hydration gear.

Med Bow Rail Marathon

Laramie, Wyoming

August 9, 2025

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The Med Bow Rail Marathon takes runners on a stunning high-altitude journey along the Medicine Bow Rail Trail, where they navigate a gently graded gravel path through dense forests, open meadows, and panoramic views of the Snowy Range Mountains. Known for its exceptional organization and limited to just 200 participants, this race offers a unique two-state adventure from Wyoming into Colorado, providing a challenging yet visually rewarding experience for marathoners seeking the untouched beauty of the American West.

Skyline Mountain Marathon

Ogden, Utah

August 9, 2025

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The Skyline Mountain Marathon challenges runners with its rigorous 42.9-kilometer course, featuring steep ascents and descents, an elevation gain of 1,597 meters, and breathtaking views of Utah's Ogden Valley. This marathon offers a rewarding experience for seasoned trail enthusiasts, combining the tranquility of a less-crowded, community-focused event with the thrill of conquering some of the most picturesque mountain trails in the region.

Tunnel Vision Marathon

North Bend, Washington

August 10, 2025

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The Tunnel Vision Marathon captivates runners with its exhilarating net downhill course, beginning at the Hyak trailhead and featuring a signature 2.4-mile tunnel that demands headlamps for a journey through complete darkness. Known for its breathtaking mountain views and high potential for personal records, this USATF-certified race is a strategic choice for those aiming to qualify for the Boston Marathon, offering a meticulously organized event with outstanding race-day amenities.

Humboldt Bay Marathon

Eureka, California

August 10, 2025

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The Humboldt Bay Marathon features a USATF-certified loop course that meanders along the picturesque Eureka Waterfront Trail, offering runners the chance to experience a "near pancake flat" terrain with gentle rolling hills and scenic bridge crossings over Humboldt Bay. Ideal for those seeking a Boston Marathon qualifier, the race combines a cool August climate with an intimate, community-focused atmosphere, all set against the stunning natural backdrop of Northern California's coastline.

Crater Lake Marathon

Crater Lake National Park, Oregon

August 12, 2025

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The Crater Lake Marathon challenges runners with its high-altitude course, featuring dramatic elevation changes and a mix of paved roads and rugged terrain within the stunning landscape of Crater Lake National Park, Oregon. This exclusive race, limited to 500 participants, combines physical endurance with breathtaking views of landmarks like Wizard Island and Phantom Ship, offering a truly memorable experience in one of America's most scenic settings.

End of Summer Marathon

Rockaway Beach, New York

August 23, 2025

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The End of Summer Marathon takes runners along the picturesque Rockaway Beach boardwalk, offering a flat course that loops four times for the full marathon, testing both physical and mental endurance. Set against the backdrop of New York's charming oceanfront, this race combines scenic beauty with urban convenience, making it a memorable experience for both competitive runners and those simply looking to enjoy a picturesque run.

Rockaway Beach End of Summer Marathon

Rockaway Beach, New York

August 23, 2025

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The Rockaway Beach End of Summer Marathon invites runners to enjoy a flat, multi-loop course along the scenic boardwalk of Rockaway Beach, New York, with stunning ocean views and minimal elevation changes. This race not only provides an excellent opportunity to set personal records but also captures the vibrant community spirit, offering a memorable end-of-summer experience supported by hydration stations, participant t-shirts, and finisher medals.

Millennium Meadows Marathon

Grand Rapids, Michigan

August 24, 2025

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The Millennium Meadows Marathon in Grand Rapids, MI, features a scenic 4.05-mile loop through Millennium Park's lush meadows and along the Grand River, offering a mostly flat and shaded course ideal for running. Known for its community spirit and Boston-qualifying potential, this late-August race challenges runners with its repetitive loops and warm weather, while providing ample support and a chance to achieve personal bests amidst beautiful natural surroundings.

New England Green River Marathon

Greenfield, Massachusetts

August 24, 2025

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The New England Green River Marathon features a stunning net downhill route from Marlboro, Vermont, to Greenfield, Massachusetts, guiding runners through charming landscapes and across an 1870s covered bridge. Known for its breathtaking scenery and potential for personal bests due to its 1,400-foot descent, this USATF-certified course is celebrated as the fastest in New England, offering a memorable journey through picturesque and historic terrain.

Marquette Marathon

Marquette, Michigan

August 30, 2025

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The Marquette Marathon takes runners on a breathtaking point-to-point journey from Ishpeming to Marquette, Michigan, featuring a predominantly downhill course with a significant elevation drop of 1,241 feet and scenic views along the Iron Ore Heritage Trail. As a Boston Marathon qualifier held on Labor Day weekend, this race combines the allure of a fast course with the vibrant community spirit and picturesque backdrop of Lake Superior, making it a compelling choice for both seasoned and aspiring marathoners.

East Canyon Marathon

Morgan, Utah

August 30, 2025

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The East Canyon Marathon is a breathtaking point-to-point, downhill race that starts at Big Mountain Pass, offering runners stunning views of Salt Lake City and a thrilling descent through diverse landscapes like the serene East Canyon Reservoir and striking Red Rock Canyon. As a Boston qualifier, this late-summer marathon in Morgan, Utah, challenges participants with its demanding terrain and strategic pacing, supported by well-placed aid stations and a welcoming finish at the Morgan County Fairgrounds.

Rockin Brews Marathon

Monona, Wisconsin

August 30, 2025

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The Rockin Brews Marathon in Monona, Wisconsin, features a scenic course that winds through tree-lined streets and along the picturesque shores of Lake Monona, with stunning views of Madison's skyline and the Frank Lloyd Wright-designed Monona Terrace. This Boston Marathon qualifier not only challenges with a few elevation changes but also delights runners with a vibrant Finish Line Festival complete with craft beer, cider, and live music, creating a festive atmosphere that celebrates both the sport and community spirit.