In 68 days · Sat, Oct 3, 2026
Don't let race day sneak up
One email during race week. That's it.
Saturday, October 3rd, 2026
Greylock Glen Gould Rd, Adams MA
Ultra
47–63°F · some rain risk
See last 10 years
On this date: rain 3 of the last 10 years
2025
39–67°F
dry
2024
49–66°F
dry
2023
46–76°F
dry
2022
40–51°F
dry
2021
47–67°F
rain
2020
40–55°F
dry
2019
42–47°F
rain
2018
51–60°F
dry
2017
43–65°F
dry
2016
53–65°F
rain
Best months to race in Massachusetts →
About this race
Race Overview
Circumnavigate the highest point in Massachusetts at the 2026 Greylock Go Around 50K, a Mountain Bike Fundraiser for Thunderbolt Ski Runners:
Date and Location
- Date: Saturday October 3, 2026
- Location: Greylock Glen Gould Rd, Adams, MA
Registration Details
- Fee: $75 for non-members, $50 for members
- Sign In: 7:30am-8:30am
- Start Time: 9:00am
- Cap: 150 registration cap
Equipment Requirements
- Bike: Mountain Bike required
- Helmet: Riders must wear a properly fitted helmet
- Toolkit: Basic toolkit (multitool, tube, pump, CO2) encouraged
Course Information
Course GPX file will be available the week prior to the event. Rough course breakdown: 31 miles/50K, 4,100 feet of climbing. 20% Paved, 50% forest road/double track and 30% single track. A MOUNTAIN BIKE IS REQUIRED!
Proceeds
Proceeds of the event benefit ongoing trail development and stewardship around Mt. Greylock, including active trail building grants.
Estimated Moving Time
Estimated moving time: 3.5 - 5.5 hours.
Routes
- Strava Route: View on Strava
- Trailforks Route: View on Trailforks
More Information
For more details and to register, visit: Greylock Go Around 50K Fundraiser
Course map
Suggested Races
Organize this race?
Claim it free to manage your listing — and get it featured for free, while spots last.