Cohasset Triathlon logo

JUNE 24, 2018


Course Description

The Course

The course begins with a swim at Sandy Beach followed by a fast bike course that winds through historic Cohasset, and concludes with a scenic run along the waterfront on Jerusalem Road.

The Swim

The .25 mile ocean swim is in a protected a cove called Sandy Beach. It will be in water no deeper than 9 feet. Water temperatures average 62 degrees. Wetsuits highly recommended. In the event of poor swim conditions, the race director and the Cohasset Harbor Master reserve the right to shorten, alter or eliminate the swim course.

The Bike

The clockwise bike course includes 12 miles of scenic roads winding through Cohasset and North Scituate. The course will begin at the beach and will head down Atlantic Avenue to Border Street. Riders will continue down Border to Gannett Road. In North Scituate, the course makes a right on Main Street towards the Cohasset Town Common.

IMPORTANT NOTE - NEW COURSE CHANGE: On Main Street just before St. Anthony's Church athletes will make a right on Summer Street - then a left on Elm - then a right back onto Main Street. This change will help alleviate traffic concerns around the church and downtown Cohasset. The course will the continue as normal to Cedar Street.

Follow Cedar and turn right on Route 228. The final leg will take riders onto Jerusalem Road and finally back to the transition area at Sandy Beach. The course is not closed to traffic. Athletes must stay to the far right at all times, unless passing another cyclist. Drafting is not permitted and will be enforced. Pass only on the left; do not pass any cyclist on their right..

The Run

The 3.2 mile clockwise run will loop around Little Harbor. Runners will follow Atlantic Avenue and turn right on Beach Street. At Main Street head right. Runners will follow Main Street to Jerusalem Road. Follow Jerusalem Road to Atlantic Avenue turn right with a photo finish just a short distance from the transition area.


Due to bridge construction on Mordecai Lincoln Road (in north Scituate) the bike course will bypass Mordecai Lincoln Road. The course will go from Gannett Street all the way to the stoplights at Country Way (also known as Main Street). Athletes will take a right onto Country Way (not Mordecai Lincoln!) for this year only.

ALERT #2: Due to poor road conditions on Jerusalem Road in Cohasset, we are grateful for the support from the Town of Hull to use their newly paved roads. Athletes will travel on Route 228 and no longer turn right on Jerusalem Road (as in previous years). They will continue to School Road (in Hull) then turn right on Atlantic Road. Athletes will then continue to the intersection of Atlantic/Jerusalem and turn left towards Sandy Beach.