Summer Sizzler - Denver

The Summer Sizzler in Denver is an exciting annual running event scheduled for August 16, 2025, in Thornton, Colorado. It features a variety of races including a Kids Dash, 1 Mile, 5K, 10K, and 15K, along with a virtual race option. Participants can enjoy great swag such as designer shirts and custom medals, along with chip-timing and live results.

The event promotes family fun and fitness, offering delicious treats and free shaved ice at the finish line. Volunteers are also welcomed, providing opportunities to earn rewards while supporting the event. Visit the organization's website for the most recent information.