We rode from Sleepy Hollow High School to the Croton Dam and back on 9 26 20, total 22 miles round trip.

This is quite a varied trail experience. First, there are several on-road segments that connect the trail sections. The trail itself was mostly hard packed dirt, with some gravel...you need a trail bike or a mountain bike. Basically flat, but some of the road crossings had ups and downs and there were a few slightly hilly areas too.
It’s a complicated route, you definitely need a map or a Ride With GPS route or something similar….trail has signs but not always marked clearly. Old Croton Aqueduct.org has a lot of info.
The first section, from Sleepy Hollow High School to Scarborough was all off road. Once in Scarborough, we took a detour down River Road, to Creighton, to Scarborough Station Road to avoid a section right along Route 9. Crossing Route 9 at Scarborough Road, you ride on-road up a small hill to Long Hill Street, where you pick the trail up again. This section ends in the parking lot of an apartment building You’ll need to cross Route 9 and make your way diagonally through Nelson Park and Nelson Sitting Park to Spring Street in Ossining. After a couple of blocks we took a right on Maple Street and then on the left you’ll see the trail proceed between buildings…sort of like a walkway. This “walkway” continues through Ossining, over a nice high bridge and eventually ends up out by the Northside fire house, where you pick up the trail again. The next big cue will be crossing Route 9 again at Audubon Street, you ride on road up to Piping Rock, take a left, and pick up the trail shortly on the right, finally coming out on Ogden drive. Turn left, ride on road to Old Albany Post Road, turn right, pass under the highway, and then you have the choice of turning right on Shady Lane Farm Road and picking up the trail to go around the GE property (this was very rough, hilly, and difficult) or staying on road, riding uphill and turning right on Hillcrest Road. Both options take you out to Indian Brook Service Road, where you’ll again pick up the trail and follow it to the Croton Dam, passing over Quaker Ridge Street a number of times.
The area through Rockefeller Park and Scarborough is really nice, including that off road detour in Scarborough where you can see the river behind some nice houses. The section next to Rockefeller park is really beautiful, you can see the hiking trails of the park from the Aqueduct. And the section immediately before you reach the dam is nice too, pretty wide, nice tree-lined stretch. I have to say though that the section to get to that (around the GE offices) is rough. And you have to ride through downtown Ossining, not hard but not of course a real trail, and there’s one section where you have to walk your bike up and over some steps. So, all in all – sort of a mixed review, some really nice sections and views but be aware that there are some challenging sections and on road sections too. And please note that there’s a whole other section south of here that goes all the way to NYC.

We came on a beautiful September day in the middle of the week. The entrance to the park was well marked on the Columbia Trail but after that you're on your own. Turn left and we ended up in someone's backyard, turn right and it only went for about half a mile with a couple of buildings that did have signs but ended at two bridges you couldn't cross. No signs anywhere that things were closed for any purpose. We asked two locals walking dogs along the trails where things led and they didn't know any more than we did. Said they had lived there for two years and still couldn't figure it out. We came with mountain bikes but there was no way we could use them safely, plan on hiking it only. So overall it was a pretty disappointing experience and we did the whole thing in half an hour.

Wednesday afternoon September 16, 2020
Weather: Glorious mid 70's and dry

I usually ride trails, but this linear park was just wonderful. VERY scenic for an urban park with the Saddle River (a stream really) and several large ponds, lots of forest. I even saw several deer and wild birds. Off the nice asphalt there as some dirt single-track for the more adventurous bikers. Lots of nice parking, bathrooms and other amenities. This is the best urban biking I have ever done. When I was done riding ever part of the path, back and forth, my Strava said 18+ miles. Thanks New Jersey.

My wife and I love to walk in scenic outdoor areas. This level path is perfect. Enough length to get exercise without overdoing it. Easy access from both ends. Parking is limited at Mulford Rd but there is a paved parking lot at the Lake Iliff Rd trailhead.

Many varieties. Through woods, paved paths. Convenient if you need to pick up something from any of the hundreds of stores around

Rode with my friends Sept 19, 2020. Started at Pittman’s orchard which was the wrong choice. Single and narrow track and met with lotsa roots and rocks and then the stairs. We made it alive though after encountering 2 cubs by Dingman’s. I suggest an easy start at Hialeah for an easier and more scenic ride. Carry a bear spray too if you decide riding during cooler weather.

Seems like part (most?) of the trail is closed as of July 2020 by order of the mayor of the Borough of High Bridge due to "unsafe conditions." Supposedly, the order is only temporary, but the trails are still closed despite the order having nominally expired. Not sure when/if the trails will actually reopen.

A short stretch of the trail from the Columbia Trail to the Union Forge Bridge is still open. The part that's open is interesting, so I hope the rest reopens within a reasonable timeframe.

Great trail with greens and manageable hills. But some dangerous crossings and noise highways. Recommend ear buds. I wouldn’t take my kids for whole trail. Just south is fine. Will definitely go during foliage season.

Rode from the trail parking lot in Andover to Lafayette. IPhone said 8 miles each way. My husband rode a commuter bike which did fine on this stretch. We saw two bow hunters from the trail - we had not realized that deer season had just started - and were happy we had worn vivid colored shirts, albeit to be visible to cars. We stopped for brunch at the Millside cafe in Lafayette, which is visible from the trail. I recommend it as a tasty destination!