Marji Gesick

Marji Gesick

Marji Gesick is an ultra endurance mountain bike and trail running event held in Marquette County, Michigan. The production includes multiple race formats and distances that use local singletrack, connector trails, and public trailheads across the county. The event dates in 2026 are September 18 to 20, and a related Marji Camp is scheduled for June 4 to 7, 2026.

Races follow a self supported ethos. The organizer does not operate aid stations and expects participants to navigate with GPS, carry required gear, and be prepared for severe weather and remote conditions. Checkpoints are at undisclosed locations and collect tokens; losing a checkpoint item may result in disqualification. Drop bags are accepted at the start and transported to Jackson Park in Negaunee for race use.

Formats and distances include:

• MG15
• MG50
• MG100
• MG200 (held every five years)
• Worst of Both Worlds
• Mini Marji

The event was established in 2015 with an original 100 mile route connecting major trailheads. Timing services are provided by a professional timing company. Marji Gesick is produced by a local 501(c)(3) organization that directs a portion of entry fees back into trail building and local trail organizations. Local bike shops support the event and supply services for participants. Visit the organization's website for the most recent information.