Hike Mount Greylock via Thunderbolt Trail

Massachusetts Thunderbolt Trailhead

Added by Rebecca Nichols

Located in the Berkshires, Massachusetts' high point will not disappoint. From the summit, views are possible into five different states: Massachusetts, New York, Connecticut, Vermont, and New Hampshire.

This hike starts in Adams, Mass on Thiel Road. You can drive the road as far as you can until you reach a barrier. There is plenty of room to park off the road on both sides. You will walk he road for 0.5 miles until you meet the foot trail, marked as Thunderbolt.

The Thunderbolt Ski trail was originally built in 1934 and rerouted in 1937. It was the site of Massachusetts State Downhill, Eastern Downhill Championship, and various local time trials and trophy races throughout the 1930's and 40's.

Climbing the eastern side of the mountain this is the steepest trail up Mount Greylock (Massachusetts high point 3491 feet). At about the 1 mile mark from your car the trail becomes considerably steep and heads toward the summit ridge. At approximately 1.9 miles you reach the summit ridge known as Hadley Lookout with beautiful views of the town of Adams below. The last 0.5 mile stretch is along the Appalachian trail. The trail will pass a small warning hut shelter.

The summit features A Veterans War Memorial Tower and Bascom Lodge featuring overnight accommodations and meals May - October. There is a road to the summit as well opened seasonally.

Pack List

  • Hiking Boot
  • Water
  • Snacks
  • Camera
  • Snowshoes (Winter)
Read More

Please respect the places you find on The Outbound.

Always practice Leave No Trace ethics on your adventures. Be aware of local regulations and don't damage these amazing places for the sake of a photograph. Learn More




Skill Level:



Year Round

Trail Type:



4.8 Miles

Elev. Gain:

2275 Feet



Food Nearby
Picnic Area

Are we missing something?

Suggest an edit

How to Get There

8 months ago

Big Risk, Big Reward

The thunderbolt trail was challenging with near vertical trails towards the summit. A bit more nerve racking for me as I was leading a group of teenagers up it, but was well worth the accomplishment. Greylock offers phenomenal views from the top.

8 months ago

Added by Rebecca Nichols

I hike to push my limits both mentally and physically, take in the beauty of the great outdoors, and just to get away from it all. Every chance I get you will find me in the mountains, on a kayak or ending my day by the campfire!

More Adventures Nearby

Walk the Arnold Arboretum Trail

Massachusetts / Arnold Arboretum Trail

Park in the lot off of Arborway (see map) to access the trail. Trail can be accessed from March to October, is dog-friendly, and is great for kids.

Hike the Pratt's Brook Conservation Area Loop

Massachusetts / Pratt's Brook Conservation Area Trailhead

Park on the shoulder of Parker street to access the trailhead. You can punch in the coordinates to a GPS if you need help finding it: 42.4545482, -71.4358192.

Hike along the Nashua River and the Oxbow National Wildlife Refuge

Massachusetts / Nashua River and the Oxbow National Wildlife Refuge Parking

Park in the lot on Tank Road to access the Nashua River trail. Keep your eyes peeled for turtles, chipmunks, birds, and other wildlife! This trail is open from April to October.  Photos: U.S.