Mt. Greylock summit via Thunderbolt Trail

HARD 32 reviews

Mt. Greylock summit via Thunderbolt Trail is a 5.6 mile lightly trafficked out and back trail located near Adams, Massachusetts that features a waterfall and is only recommended for very experienced adventurers. The trail is primarily used for hiking, walking, nature trips, and birding and is accessible year-round. Dogs are also able to use this trail.

DISTANCE
5.6 miles
ELEVATION GAIN
2273 feet
ROUTE TYPE
Out & Back

dog friendly

birding

hiking

nature trips

walking

views

waterfall

rocky

The trail starts from parking area up to AT via Old Summit Road. A little confusing with the skiing signs, but head east up to AT. Hike along AT to a point where Thunderbolt ties in, and make a push up to the summit of Greylock. Take the thunderbolt trail north until you reach the Appalachian trail (marked while), where you will turn left until you reach the Mt. Greylock summit. The Thunderbolt Trail was originally a CCC built ski trail, and in 1936 hosted the United States Eastern Alpine Ski Championships. Its current course has been somewhat altered from the original, but is no less challenging. The Thunderbolt Foot Trail climbs gently west winding through the forest south of Hoxie Brook, and eventually the foot trail will intersect the old ski trail on your right. At about the half mile mark, the trail becomes considerably steeper and heads northwesterly towards the summit ridge. This stretch is quite broad and is recognizable as a steep, tree-lined ski run. At about the 1.5 mile mark the trail reaches the summit ridge, where you have a beautiful view upon the town of Adams from Hadley Lookout.

hiking
20 days ago

1 month ago

hiking
1 month ago

Hiked Greylock in the first week of March. Weather was terrible. Got colder and worse as we reached the summit. The wind chills were close to -25F. Our phones froze and did not work! I highly recommend you to carry extra warm clothes if you decide to hike this trail during the winter months. View from the summit is absolutely stunning. Mt Greylock summit offers a wide angle view of 5 states - MA, VT, NY, NH and CT.

2 months ago

hiking
6 months ago

hiking
7 months ago

hiking
7 months ago

hiking
7 months ago

9 months ago

Great Hike But Be Forewarned. The Thunderbolt Trail Splits Off To The Right At One Point But The Sign Looks Like It Goes To Left Up The Steep Incline. That Is A Direct Shot Up To the AT And Cuts Off About 3/4 Of A Mile But Not For The Inexperienced Hiker. It Was Very Steep And Strenuous, We Came Down The Other Way On The Thunderbolt And It Was Much Easier As You Had 3/4 Of A Mile Extra To Spead The Elevation. All In All A Great Hike Thiough With A Beautiful Summit.

hiking
10 months ago

hiking
10 months ago

Mountain was larger than I had expected from photos. Eastern approaches are very steep dirt paths. ~2300' of gain in 1-1.5hrs. Signage could be better coordinated, and was sometimes confusing. Trail was multi-use partway and part repurposed ski trail. After all of the hard work people will whiz by in their cars near the top! It is not at the quality level of the other northeast highpoints, but a fun hike, and great views nonetheless. B- overall

Monday, May 09, 2016

amazing waterfalls

hiking
Tuesday, March 15, 2016

Sunday, March 13, 2016

Incredible views at the top-worth the hike !

Sunday, March 13, 2016

Monday, February 29, 2016

Great hike. Took thunderbolt trail in late February. Icy near the summit. Took AT south from summit which was really icy until I got to Gould trail. Recommend hiking pole and good boots. Also plenty of water.

Saturday, August 29, 2015

For a beginner, it was pretty difficult. But, the view from the top is worth every difficult point.

hiking
Saturday, August 08, 2015

Loved this hike. We took the Thunderbolt trail starting at Gould Rd. This trail was quite strenuous. The toughest I've done so far, for sure! But with great challenge comes GREAT reward. This trail was not as long as the Cheshire Harbor trail, and you really gain a lot of elevation very quickly. Bring more water than you think you want. You'll want to park on Gould Rd-- follow it to its end, and there will be a parking lot on your right. There is the trailhead for the Bellows Pipe which then becomes the Thunderbolt (so I understand). Just follow that! The first leg is a moderate incline, and well-maintained. Not too bad. You'll come to a fork, where you're given two options: follow the Bellows Pipe or make a left towards the summit on the Thunderbolt. We chose the Thunderbolt, and that's where it got REALLY hard. Lots of roots and rocks, some scramble, but the incline was extreme. Also, wear bug spray because a large portion was overgrown with tall grasses (though the trail remained visible). A mile and a half later, we were on the AT and didn't even notice... but the last 0.4 were not so hard. We made it to the top in just over two hours, with frequent breaks, and we're pretty experienced hikers. The summit is incredible. Most expansive views of the area I've seen, and total 360. Spend all day up there! We did! Nice cafe, restrooms, water, picnic benches, and the Thunderbolt ski shelter is pretty cool, too. Just be sure you leave ample time to descend-- much harder on the way down for your knees. Bring a walking stick. Hiking boots STRONGLY recommended. Will return for foliage in fall!!!!

hiking
Monday, August 03, 2015

Awesome mountain! Great trails, absolutely fantastic views, great facilities, great food at the summit.... Great great great! Highly recommend it!

hiking
Saturday, July 11, 2015