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35 Years. One River. Endless Miles of Mud. Be part of the 35th Merrimack River 10-Mile Trail Race
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35 Years. One River. Endless Miles of Mud. Be part of the 35th Merrimack River 10-Mile Trail Race

Andover, MassachusettsWebsite
In 160 days
10 mi
Opens Dec 10

Key dates

Registration opens

Dec 10, 2026

39d

Registration closes

Apr 7, 2027

157d

Race day

Apr 10, 2027

160d

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Listed from RunReg. Checked Nov 1, 2026.