The Mountain Lakes 100, set for September 19, 2026, in the stunning wilderness near Madras, Oregon, offers an unparalleled 100-mile ultra-running experience. Renowned as one of Oregon's most beautiful and well-supported 100-milers, this race begins and ends at the picturesque Olallie Lake Resort. Runners will traverse 101 miles through a breathtaking landscape, featuring technical and rocky sections, expansive mountain views, and approximately 60 miles along the iconic Pacific Crest Trail. With a total elevation gain and loss of 11,700 feet, this course promises a significant challenge amidst spectacular scenery.

The course is predominantly single-track trails, winding through the Mt. Hood National Forest, past dozens of pristine mountain lakes, and between the majestic peaks of Mt. Jefferson and Mt. Hood. During mid-September, runners can expect vibrant autumnal foliage, with shocking oranges, reds, and yellows painting the trails. While typical race day conditions often see highs around 80°F, nights can bring lows of 46°F, making warm layers and bright headlamps essential for navigating the wilderness after dark. Despite its challenges, including remote sections with no cell service, many consider this a highly runnable course, making it a popular choice for those tackling their first 100-mile race.

What truly sets the Mountain Lakes 100 apart is its exceptional on-course support and welcoming "old school ultra community feel." Sixteen aid stations, staffed by dedicated and enthusiastic volunteers, are fully stocked with a wide array of ultra fare, including warm food options like pierogies and quesadillas available throughout the night to fuel your journey. As a Western States 100 qualifier, the Mountain Lakes 100 is not just a race; it's a profound wilderness experience that fosters a deep connection to the trails, underscored by a mandatory eight-hour trail work requirement for all participants.