Sea to Summit Series

The Maine - Sea to Summit Race Series starts with our Mount Desert Island Marathon, Half & Relay held on October 15, 2017 and concludes at the Millinocket Marathon & Half on December 9, 2017.

Upon completion of the race in Millinocket, Sea to Summit Series participants will be awarded a special finishers medallion!


Race series participants MUST be registered for MDI, Millinocket, and the Sea to Summit Series.

When you sign up for MDI you will have the option of adding your participation in the 'Sea to Summit Series' to your registration.

  • Register for Millinocket: HERE
  • Register for MDI + Race Series: HERE
    • Already signed up for MDI? If you signed up to run MDI prior to the launch of the Sea to Summit Series, click HERE for directions to update your registration to include your participation in our race series.


The Millinocket races are FREE to register! In lieu of a traditional entry fee, participants are required to generously support this struggling region.

Participants may choose ANY of the distance options offered at either race.

Both MDI and Millinocket feature USATF certified marathon and half-marathon courses that may be used to qualify for entry into the Boston Marathon and NYC Marathon.

To learn more about each event please click below:


Both the MDI and Millinocket events were founded by race director, Gary Allen: "Encouraging MDI's loyal runners to come back to attend Millinocket and to help further support the struggling Katahdin region is a natural fit."

Click HERE to read 'Marathon Man' by Kathryn Miles for Down East Magazine

Click HERE to read 'Marathon Man' by Kathryn Miles for Down East Magazine