Runners from around the globe are invited to experience one of the most scenic races on the calendar: The MDI Marathon. Nestled amidst breathtaking landscapes, this race offers participants an unforgettable journey through stunning natural beauty and challenging terrain. The marathon route winds along picturesque coastal roads, offering runners panoramic views of the ocean as they push themselves towards the finish line. Along with the full 26.2-mile distance, there's also a half-marathon option for those looking to test their endurance over 13.1 miles. Both events are designed to challenge athletes while rewarding them with awe-inspiring vistas and an atmosphere that celebrates both competition and community. For relay teams seeking an exhilarating team experience, the MDI Relay offers participants the chance to share the journey across three legs of varying distances. Each runner will encounter unique sections of the course, ensuring a diverse and engaging race for all involved. Registration fees vary depending on when you sign up: - Marathon: $145 (through June 30), $155 (July 1 - August 31), $170 (after September 1) - Half-Marathon: $125 (through June 30), $135 (July 1 - August 31), $150 (after September 1) - Relay Team Member: $95 (through June 30), $105 (July 1 - August 31), $120 (after September 1) Spaces are limited, and registration may close early if capacity is reached. A select number of charity bibs will be available after the general registration period closes. For detailed information on race day logistics, schedules, and more, visit runmdi.org to ensure you're fully prepared for this unforgettable event.
Races Offered
3 Person Marathon Relay Team
Oct 18, 2026
straighten
Distance —
42.2K
terrain
Type —
Running
timer
33 days remaining
sell
$105.00
General Reg - MDI Half 13.1M
Oct 18, 2026
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Distance —
21.1K
terrain
Type —
Running
timer
33 days remaining
sell
$135.00
General Reg - MDI Marathon 26.2M
Oct 18, 2026
straighten
Distance —
42.2K
terrain
Type —
Running
timer
33 days remaining
sell
$155.00
Half Charity Bib - Fundraising Required 13.1M
Oct 18, 2026
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Distance —
21.1K
terrain
Type —
Running
timer
33 days remaining
sell
$135.00
Marathon Charity Bib - Fundraising Required 26.2M
Oct 18, 2026
straighten
Distance —
42.2K
terrain
Type —
Running
timer
33 days remaining
sell
$155.00
Public Safety Relay (Marathon)
Oct 18, 2026
straighten
Distance —
42.2K
terrain
Type —
Running
timer
33 days remaining
sell
$0.00
Weather History
These values represent the 3-year monthly averages for October in Bar Harbor.
thermostatTemperature
7.9° / 15.3°
wb_sunnyFeels like
4.8° / 12.4°
light_mode
Avg sunshine hours
7h 51m
water_drop
Avg rainfall
3.0 mm
ac_unit
Avg snowfall
—
air
Avg wind speed
12.3 km/h (Gentle breeze)
opacity
Sweat loss rate
Low
terrain
Course conditions
Firm and slightly soft
sunny
Max UV Index
Moderate (4.0)
humidity_mid
Humidity
78.7%
wb_twilight
Sunrise
06:49
nightlight
Sunset
17:47
About Bar Harbor
Learn more about the host city, Bar Harbor.
Bar Harbor is a village on Mount Desert Island in Hancock County in the Down East area of Maine. It is a useful base for those visiting Acadia National Park.
