There are a bunch of trails in the park. One can pick multiple routes and start/end points. The main trails are paved. I estimate some approach 30 degree pitch, but most sections have little cross slope.
The path up to the tower gets steep (estimate at least 30 degrees.) The surface is crushed stone and maintaining traction is difficult, especially toward the top. There are some plastic erosion control strips across the track that are good places to stop and rest, but are tricky to go over fast on descent. There is an exposed rock face at the tower base that can be climbed to get nice view over Champlain Valley.
Ascent to the Pinnacle is not too tough. At the top, there is a gazebo with long steps, that I climbed in handcycle. Turning around inside the gazebo is hard, but possible. Easier if you have a friend to yank you around.
There are a number of trails though the woods. Have not tried any from tower (yet) because they look VERY challenging. I have ridden the trail that goes down to east from Pinnacle. It is narrow and gets steep, (well over 30 degrees,) with roots and rocks, and logs to get over/around. There is one place where trail is narrower than my One Off, and I have to lift one front wheel over obstacles. This trail is fun to go down. I do not believe I could go up it. There are some other trails in woods that are less steep and have fewer obstacles.
Again, this is not so much a continuous loop as it is a series of trail segments and obstacles in a park where I’ve had fun playing.
Trail Name: Ethan Allen Park
Location: Burlington, Vermont
Type: Narrow trail (< 30"), Wide trail (≥ 30″), Recreation path, Start and end at different points
Rating: Adaptive Level 05
Length: 1.5 mile +/-
Steepest Section: Difficult – over 30º
Most Off-Camber Section: Mild – under 10º
Terrain: Mostly hardpack, lengthy loose sections
Obstacles: Root exposure, Deep ruts and erosion, Brush and/or other growth, Baby heads and/or rock gardens, Drops, ledges, jumps
Help Needed? Nope
Directions to Trailhead
Intersection of North Avenue and Ethan Allen Parkway in Burlington