Holland Blueberry Run - August 11th Our 5K course preview run for Holland Haven Marathon is the Holland Blueberry Run on Tuesday August 11th at 6pm. Holland Blueberry Run is a free and fun event for the community to get together and run. Some of the 5K route is run on the Holland Haven Marathon course near Bowerman Blueberries Farm Market. Stick around after the run for a free blueberry donut. Holland Haven Marathon - September 13th Holland Haven Marathon 2026 The full marathon is sold ...