Gravel with rock, some larger.
The trail starts at Hill Side St. near Houghton's Pond. The trail is wide with gravel and goes gently uphill. After crossing some smaller trails, it crosses over Skyline Trail South
. Shortly after it reaches another junction where it now follows green markers for awhile.
The trail slowly gets steeper and with more rocks. At the next junction, it turns right by a small pond and crosses the Skyline Trail
and leaves the green markers. Now the trail gets steeper and even rockier and has some stone steps. At the next junction, it turns left and follows red markers to the end. Where you'll find the summit of the Great Blue Hill and its observation tower.