Registration Open for Butterfly Day 5K

Register by clicking here.

Get active this July 4th weekend by participating in the 2019 Au Sable Butterfly Day 5k Run/Walk around Big Twin Lake! The race starts at 9:00 AM on Saturday, July 6th. Proceeds from the 5k run/walk benefit Au Sable's Environmental Education Program, which educates over 3,000 students from area schools each year at their Environmental Learning Center on Big Twin Lake.

The Run/Walk route takes participants around beautiful Big Twin Lake, beginning at Blue Lake Township Hall (10599 Twin Lake Rd, Mancelona, Michigan) and ending at Au Sable Institute of Environmental Studies (7526 Sunset Trail NE, Mancelona, MI). All registered participants for the race receive a native perennial wildflower from Designs by Nature. Awards will also be given for overall winners and 1st and 2nd age group. All runners 10 and under recieve medals.

$15 (Preregister), $20 (Day of). Race day registration starting at 7:45 AM at Blue Lake Township Hall.

Following the race, we invite you to stick around for:

10:00 am - 12:00 pm Native Plant Sale, Crafts, and Butterfly Hunting

For more information, please contact Paul Wiemerslage at 231-587-8686 or