⚠️ 2027 edition: provisional information
The date is estimated from the 2026 edition (July 19, 2026), on the same day of the week. Courses, start times, fees and description are carried over from the previous edition: check them on the official website. This page will be updated as soon as the organizer publishes them.
Available distances
About
The Island Ripple Run is a 4 mile race (6.4 km) held on July 18, 2027, at Diamond Cove, covering Great Diamond Island and Little Diamond Island in Portland's Casco Bay. Runners follow scenic roads and wooded trails while taking in ocean views. The main race starts at 9:30 a.m.
The event also includes a kids' race, the Kids Diamond Dash, at 9:15 a.m., and ends with light refreshments. Proceeds benefit Rippleffect's Dennis Farrell Memorial Scholarship Fund, based on neighboring Cow Island.
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Races nearby
Other upcoming races around Portland.
Portland Waterfront 5K
Nov 7, 2026 · Portland, ME · 3 mi away
3.1 mi
Kick Out Mesothelioma 5-Miler & 2.5 Mile Walk In Memory of John W. Griffin
Nov 8, 2026 · Portland, ME · 3 mi away
2.5 mi
Raccoon Run 5K
Jun 20, 2027 · Portland, ME · 3 mi away
3.1 mi
Falmouth 4-Miler
Apr 10, 2027 · Falmouth, ME · 3 mi away
4 mi
Shipyard Old Port Half Marathon & 5K
Jun 5, 2027 · Portland, ME · 4 mi away
13.1 mi · 3.1 mi
Portland Thanksgiving Day 4-Miler
Nov 26, 2026 · Portland, ME · 4 mi away
0.6 mi · 4 mi