Castle 2.5K/5K/10K 2026

Nestled at an elevation of approximately 8,000 feet above sea level near Conifer, Colorado, the Castle Swim Series offers runners and swimmers three distinct distances: 2.5K, 5K, and 10K. This unique event takes place in Wellington Lake, providing participants with a challenging yet breathtaking experience against the backdrop of stunning mountain scenery.
Race day activities will be announced closer to the event date, ensuring all registrants are well-informed about schedules and logistics leading up to race morning. Participants should note that t-shirts may not be guaranteed due to limited availability; organizers recommend early registration as shirt sizes could run out two weeks before the event.
For those looking to extend their stay in this picturesque setting, camping options are available for Friday night (August 21) or Saturday night (August 22), with accommodations fitting one vehicle and up to four persons. Camping spots accommodate only cars and trucks; RVs, trailers, teardrop campers, and other large vehicles will not be permitted.
Online registration closes once the parking capacity of 250 participants is reached. To ensure timely packet pickup on race day, swimmers are advised to arrive early in the morning for their respective distances. Early bird discounts apply until March 15; after this date, full prices will take effect.
The Castle Swim Series promises a memorable experience with its combination of challenging terrain and serene natural surroundings. Whether you're an avid swimmer or simply looking to test your limits at high altitude, Wellington Lake offers the perfect setting for all levels of participants.
Join us in Conifer this summer for what is sure to be an unforgettable event!