Green Mountain Marathon & Half Marathon

South Hero, VT, USA
22 Oct, 2023 (Sun)


13.1 mi, 26.2 mi


About the event

Starting Times

The Full Marathon will start at 8:30 AM.

The Half Marathon will start at 8:40 AM.



The certified (VT15301JK*) marathon and half-marathon begin and end near the house where Clarence H. DeMar, seven-time Boston Marathon Winner, once lived. The half-marathon course is out and back on the west shore of South Hero and Grand Isle; a land of farms, apple orchards, and summer cottages. The terrain is flat to rolling.

The entire course is paved. The full marathon course is two out-and-backs of the half-marathon course. 

The time cut off for the marathon is 6 hours.  The time cut off for the half-marathon is 4 hours.

*The certification is under the old race name, but applies to the new name as the course is unchanged.


Aid Stations

There will be an aid station approximately every 2 miles starting at mile 2 and stopping at mile 24 for a total of 12 aid stations (2-3 porta-potties on course). Water and electrolyte drink will be supplied at all aid stations. Additional assistance will be available to runners in the form of sweep vehicles.


Pre-registration is now open. Register Online (online registration closes Oct 21 at midnight).

Entry fee for marathon is $70 pre-registration; $80 race day (GMAA members subtract $10).Entry fee for half-marathon is $50 pre-registration; $60 race day (GMAA members subtract $5).Race day registration is from 7am to 7:45amMaximum total number of runners is 500.There is no race refund if you cannot participate.There are no deferrals.There is no wait list.There are no bib transfers.

You may change the race distance. There is a $10 charge for switching from the full marathon to the half-marathon (no refund will be given for the difference in price). There is a $10 charge for changing from the half-marathon to the full marathon plus the difference in price. See the "Transfer Event" page from the menu to make changes.

Please confirm that you are registering for the correct event: Half-Marathon or Full Marathon before your complete your transaction. Thank you!


All participants will receive a race shirt.  Shirts are unisex-sized.


Runners must be age 16 or older.


Packet Pickup

Other runners may pick up a friend or family member's race packet.

Friday, Oct. 20th - 12-6 pm at SkiRackSaturday, Oct. 21st - 10-6 pm at SkiRack Sunday, Oct. 22nd - 7-8 am at Folsom School

SkiRack is located at 85 Main Street, in Burlington, VT. 


Awards will be given to the top overall male, female & non-binary finisher, the top masters, as well as the top finisher in each age-group.

Medals to all marathon and half-marathon finishers.

  Spaghetti Dinner




Island Lodging on the race course (primarily small inns and B&Bs):

Crescent Farm Bay Farm B&B 1-802-324-5563 (mile 2-3)Ferry Watch Inn 1-802-777-2530 (mile 8-9)link to full list of island lodging (maintained by the Islands Chamber of Commerce)

Lodging at exit 16 off Route 89 (Colchester/Winooski)

Residence Inn 1-802-655-3100Hampton Inn 1-802-655-6177

Lodging at exit 14 off Route 89 (Burlington/South Burlington)

Best Western 1-800-780-7234Holiday Inn 1-800-863-6363



If you can picture the Lake Champlain Islands in mid-October, then you have reason to join us. If you have never seen Vermont or the 'Islands' in October, then you have even more reason to join us with your entire family.

Lake Champlain Islands Chamber of Commerce (800) 262-5226Burlington Things-To-DoLake Champlain Ferries (802) 864-9804   Past Runner Testimonials

Follow this link to hear what other runners have had to say about the our event.

The GMAA Champlain Islands Marathon is held for runners by runners. Our goal is to offer a quality marathon at an affordable price in a relaxed setting.  Come join us!



As with any event, it takes volunteers to make things happen. If you or anyone you know would like to volunteer at our race, we would greatly appreciate it. We need volunteers in the following areas: Water Stops/Aid Stations, Crossing Guards/Course Marshals, Packet pick-up, Finish Line, Traffic/Parking, and Runner Food Preparation.

Please email sign up on Volunteer Registration



Race Directors: Nik Ponzio and Bob Monette email: [email protected]

  Course Features Certified Marathon with all miles markedCan be used to qualify for the Boston MarathonStart and finish at 190' elevationMax elevation: 210' (miles 1 and 25)Min elevation: 100' (several locations)Lake Champlain elevation: 95'

NOTE: GMAA/Insurance rules prohibit running with a baby jogger or dog. For safety reasons and as a courtesy to fellow runners, GMAA strongly discourages the use of headphones.

There are no refunds, deferrals, or transfers.



Races offered by this event

You have 3 weeks to prepare


22 Oct, 2023 (Sun) - 08:30
26.2 mi
On site

Half Marathon

22 Oct, 2023 (Sun) - 08:40
13.1 mi
On site