8 events found. Events Views Navigation Event Views Navigation List List Today 8/29/2026 August 29 Select date. August 2026 Sat 29 Hartley Adventure Challenge August 29 • 9:00 am – 1:00 pm Hartley Nature Center 3001 Woodland Ave, Duluth, MN, United States Part adventure race, part scavenger hunt, the Hartley Adventure Challenge is a fun race that will have teams of hikers or bikers race to solve clues and find hidden checkpoints along the trails of Hartley Park. Complete the challenge by finding as many checkpoints as you can before time runs out. Teams that find the most checkpoints in the shortest amount of time will be declared the winners. Prizes will be awarded to winning teams in each category. Teams that finish all checkpoints will also receive a small award. Familiarity with the park will help, but clues may consist of a mix of Hartley park knowledge, Hartley history,…