Beautiful and well maintained…feels like it was built last night! Maybe could use a few benches but the real issue is the dangerous berms at the intersections mentioned by a previous reviewer. Truly horrible design! We saw a rider hit one hard. Fortunately he didn’t fall. They should be removed but in the meantime the curbs should be painted and potted plants placed on them to increase visibility. You will enjoy this trail just be safe.

I did this trail end-to-end yesterday as an out-and back from the southern end (no official parking at the trailhead but two supermarkets nearby could be utilized).
Overall in good to very good shape.
The non paved sections are OK for all type bikes except perhaps not for road bikes if the trail is wet.
The on-road sections are generally well marked by Empire State Trail (of which this trail is a part) signage.
Informative signage along the way.
It's not exactly a flat ride. My cycling app had it at over 1800 feet of elevation gain for the out-and-back.
Tip: About 6 miles from the southern end is the Hudson River Skywalk over the Rip Van Winkle Bridge with great views of the Hudson River and the Catskills.

If you park in Bolton State Park to start on the east end of the Charter Oak Greenway you won’t find any markings for the entrance. It actually starts right at the RT44 West highway entrance to the park. So you need to go down into the lot to park and then go back up the entrance ramp to find the beginning of the Charter Oak Greenway, which is not even marked as such though.

Also fair warning to older riders I only went the first five miles west but that portion at least has very little flat areas, almost all of it is uphill or downhill. Heading west, mostly downhill, but heading back east mostly uphill, including one extended relatively steep climb. No problem for younger riders or riders in great biking shape, but pretty difficult for a casual rider.

On the plus side that portion of the trail at least is very well paved with virtually no divots or surface cracks.

We biked the newly completed Under Mountain Road to Millerton. We have biked the other completed sections in the past and this newly completed section does not disappoint . Very scenic and easy ride with our hybrid bikes.

We started at the Hurley Marbletown Trailhead where the trail transitioned from pavement along SR 209 to all wooded. Trail is very scenic, that said trail has lots of ruts with no visual maintenance. We biked 1HR one way and turned around. Our bikes are hybrid and did not handle the poor grading very well. I would recommend wide tire bikes

Good place to take time

Loved this ride. We rode from Columbia Plaza in EG to Nassau and back. Casual riding took 1 1/2hrs to get to Nassau (and much longer to get back- as it was our first ride this year-do we were tuckered out!). Lol. Miller RD (exit 10) Schodack has a convenient store which is about 1/2 way. So a great “pit-stop”. As was “smilees” ice-cream in Nassau and a Taco place “Diablos ?”sp across the way in Nassau.

Great early fall ride. Amazing views on Mount Greylock and Lake Berkshire. Mostly scenic and quiet. Nice place to stop by the water and take in the scenery. Well paved, wide, smooth ride.

Had a very nice ride yesterday. The trail is well maintained and wide enough that you can pass safely. They are working to extend the trail into Pittsfield. If you find blinking tail light please let me know. Mine fell off my ¿! ¿