Mount Desert Island Marathon
Race Day Weather
Cool conditions, strategic pacing needed
Runners will face a start temperature of 46°F, gradually warming to 56°F by the finish. While humidity is relatively high at 73%, wind will be a factor with a tailwind in the early miles and headwinds from miles 9 to 20. To optimize performance, runners should adjust their pace in the tougher segments and stay hydrated, particularly during the warmer later miles.
Pace Calculator
Get forecast alerts for Mount Desert Island Marathon
We'll text or email you when the forecast shifts — so you can adjust gear, pacing, and strategy. Max one per day.
Race Info
The Mount Desert Island Marathon, Half & Relay is North America’s premier destination road race. The award-winning course features miles of pristine terrain passing tranquil lakes, soaring mountains, sleepy Maine villages, and stunning seaside vistas —including Somes Sound, the only fjord on the Eastern Seaboard— all set against the awe-inspiring backdrop of Acadia National Park in peak fall foliage season. The Marathon and Team Relay start in the world-famous Bar Harbor, while the Half-Marathon starts in picturesque village of Northeast Harbor. All three races finish on the quietside of MDI in the hardworking lobster fishing community of Southwest Harbor. Source
