TSR Trail Half Marathon

JUN

21

2026

A loop-format trail run in Adams, MA, offering one to three loops and a separate 5 km meadow option on varied singletrack and hiking trails; proceeds support Thunderbolt Ski Runners trail stewardship around Greylock Glen and Mt. Greylock.

Sun 21 Jun 2026

Adams, Massachusetts

Website

30 kilometers 20 kilometers 10 kilometers 5 kilometers

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TSR Trail Race

The TSR Trail Race is a loop-format trail run held on June 21, 2026, in Adams, MA, on Gould Road north of the Greylock Glen. Runners may complete one, two, or three loops; the exact loop distance is still being determined. A separate 5 km option is listed as a two-lap route around the gravel meadow loop of the Greylock Glen.

The course uses singletrack and hiking trails that are both hand built and machine built. Terrain blends ups and downs with smooth flats and is described as fun and flowy. The event is organized by the Thunderbolt Ski Runners. All proceeds support the stewardship and maintenance provided by that organization for the mountain bike and ski trails around the Greylock Glen and Mt. Greylock.

Online registration is available ahead of the event, with an online registration deadline of June 19, 2026. Location details list Gould Road, Adams, MA 01220. Visit the organization's website for the most recent information.

30 km

3 Loops

20 km

2 Loops

10 km

1 Loop

5 km

Tsr Trail Race 5k(ish)