Half Marathon

Road

Mackinac Island Great Turtle Half Marathon & 5.7 Mile

Q: How hard is the Mackinac Island Great Turtle Half Marathon & 5.7 Mile Half Marathon?

Mackinac Island Great Turtle Half Marathon & 5.7 Mile is a Half Marathon on a road course in Mackinac Island, Michigan. We don't have a verified elevation profile yet — check the organizer's course map for the climb breakdown.

Q: What should I wear for the Mackinac Island Great Turtle Half Marathon & 5.7 Mile?

Race-day weather in Mackinac Island can swing year over year, so dress for the forecast on the day. As a rule of thumb, dress for ~10°F warmer than the standing temperature once you start running. Layer with a throwaway long-sleeve at the start, gloves and a hat for sub-50°F mornings, and a singlet plus a visor when it climbs above 60°F. The published start time is 10:45 AM. Check the race-day weather forecast on this page closer to the date for a specific recommendation.

Q: When does the Mackinac Island Great Turtle Half Marathon & 5.7 Mile sell out?

Mackinac Island Great Turtle Half Marathon & 5.7 Mile hasn't published a hard registration deadline. Most races of this size raise the entry fee in tiers (early-bird, regular, late) and can sell out without warning — sign up early if you're committed.

October 24, 2026

Mackinac Island, Michigan

Rolling Course

Decision scores

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We're still profiling this race — fit signals coming soon.

About the Race

Join us for the 2026 Great Turtle Half Marathon and 5.7 Mile - one of the most scenic trail events in the country! Enjoy the beauty of Mackinac Island's Fall season running and walking the interior trails and shoreline during the last open weekend of the season. This is the 30th anniversary of this iconic Mackinac Island event! All who register will enjoy a great garment in the Great Turtle tradition, a unique commemorative Turtle medal, goodies after the race and fun festivities! After the r...

Course Profile

Course profile data unavailable for this race.

Course features

Terrain

road

Surface

Road

Elevation gain

Not measured

Course type

Not stated

Field size

Unknown

Boston qualifier

Course map

Not yet published

Elevation profile

Not measured

Accessibility & inclusion

Walker-friendly

Stroller-friendly

Dog-friendly

Kids race

Vibe & community

We don't have vibe tags for this race yet — organizers can claim the listing to add them.

No charity partner listed.

History & past results

Years running

Unknown — claim to add

Recurrence

Annual (assumed)

Past finisher times and year-over-year participation will appear here once the organizer publishes them.

Reviews

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Common questions

How hard is the Mackinac Island Great Turtle Half Marathon & 5.7 Mile Half Marathon?

We don't have a verified elevation profile yet — check the organizer's course map for the climb breakdown.

What should I wear?

Dress for ~10°F warmer than the standing temperature once you start running. Throwaway long-sleeve at the start, gloves and a hat for sub-50°F mornings, singlet plus visor when it climbs above 60°F. The race-day forecast above is the source of truth closer to the date.