Boulder Stroke and Stride Series

Lace up your running shoes for the iconic Boulder Stroke and Stride Series 5K, taking place on Thursday, July 16, 2026, in the heart of Boulder, Colorado. Celebrating its 25th season, this beloved summer series draws between 250-400 participants weekly to the stunning Boulder Reservoir, offering a unique opportunity to race alongside both local enthusiasts and some of the world's top athletes. Starting at 6:05 PM, this evening race provides a vibrant atmosphere set against the breathtaking backdrop of the Flatirons. Typical race day conditions in mid-July feature warm highs around 89F and comfortable lows near 58F, with a minimal 6% chance of precipitation, ensuring pleasant evening racing.

The 5K run course is renowned for being flat and fast, tracing an out-and-back route along the scenic Boulder Reservoir dam. Runners will enjoy unobstructed views of the surrounding natural beauty, though the exposed nature of the dam means direct sunlight can be a factor. Aid stations are strategically placed approximately every mile, providing three opportunities to refuel and rehydrate throughout the 3.1-mile journey. The start and finish lines are conveniently located at Boulder Reservoir, with entry for participants opening at 4:50 PM.

What truly sets the Boulder Stroke and Stride Series apart is its enduring legacy and welcoming community, offering a fantastic mid-week racing experience. Beyond the challenging yet rewarding course, participants can look forward to live timing and great post-race food, creating a festive conclusion to each event. Whether you're aiming for a personal best or simply soaking in the energetic atmosphere, the Boulder Stroke and Stride 5K promises a memorable summer evening run in one of Colorado's premier endurance sports destinations.