Looking for a great trail in Airline State Park, Connecticut? AllTrails has 5 great hiking trails, walking trails, forest trails and more, with hand-curated trail maps and driving directions as well as detailed reviews and photos from hikers, campers, and nature lovers like you. Just looking to take a quick stroll? We've got 4 easy trails in Airline State Park ranging from 1.7 to 42.7 miles and from 396 to 672 feet above sea level. Start checking them out and you'll be out on the trail in no time!





Stretching from East Hampton all the way to the Massachusetts border in East Thompson, the Air Line State Park Trail is mecca for hiking, biking and horseback riding in Eastern Connecticut. The trail was built along the old Air Line Railroad route, which offered a direct path from Boston to New York beginning in the late 1800s. The route was heavily damaged in the mid 1950s from the floods that ransacked Connecticut and was no longer operational. The state took over the line, and the more than 50 miles of trails that were constructed along the old railroad route are generally flat and broad. Perhaps the greatest point of interest along the trail is the Lyman Viaduct, the tallest railroad bridge in Connecticut that spanned 1,100 feet across a deep gorge above Dickinson Creek. The best access to the viaduct is through Salmon River State Forest in Colchester

Wonderful trail. And so fun to bring the kids. The last storm knocked down a huge tree that we had to navigate under, over and through. But overall great experience.

off trail
over grown
29 days ago

Nice trail. I'd call it moderate rather than easy, changing inclinations and rocky, but it's short so that eases its level of difficulty. many off trail options, first timers keep your eyes open because the trail is not well marked at the tristate point and has several cleared path options. I ended up a quarter mile deep in RI my first time because I was unsure of the correct path to make the loop.

Aldens Crossing to Rt 66 (end of passable trail); reverse to Forest St and return to Aldens Crossing. Temp in low 60s. Overcast but not humid.

road biking
washed out
3 months ago

Great place for walking or biking not much of hiking since it's just miles and miles of the same path.

4 months ago

Nice little hike.

Well marked. Tri State marker about halfway through. Also bi State marker at beginning. Use map or you could get off on another trail that connects at beginning. Two geocaches on the trail. Great trail to reach tri State marker. Great state park as well. Went in winter and was still well maintained and good parking.

really beautiful when you get to the river but trail isn't marked and has many converging trails so it's easy to get lost. you will need to use this app or be good at using maps/compasses for this trail

trail running
8 months ago

This is a wonderful spot to get in your long distance run. I’ve been a number of times and I am never disappointed. I have yet to run the entire out and back but have completed about 30 miles of it. It is a packed dirt/gravel trail that slopes very casually making the elevation gain go unnoticed. In the winter I’ve seen folks out there with cross country skies and snow shoes. This trail is good for everyone and anything. Happy trails- Ultra Ryan

This hike is not easy. The walk to the marker is sometimes steep and very rocky. We went after some heavy rain, and parts of the trail were small ponds. Beautiful hike, but should be rated moderate in difficulty.

9 months ago

Nice walk. The tree marks were not the easiest to find. When we made it to the tri State marker it was hard to find the blue marker from our trail. All in all it was a nice walk.

10 months ago

Great easy hike. Starts along the Air Line trail right off East Thompson rd. Little less than a mile up trail on left is a sign for the TSM trail loop. Not marked but well worn and an easy follow up a moderate trail to the TSM. Here you are at intersection of 3 states. Quick loop trail back to Air Line trail. Good amount of geocaches in the area and lots to check out along the trails.

11 months ago

Great trail, very easy walking, not a lot of people on this trail. Fairly secluded

mountain biking
Monday, March 06, 2017

great peaceful ride can't wait to come back and explore the entire trial.

Tuesday, January 17, 2017

Awesome for anything!!

Thursday, November 17, 2016


mountain biking
Tuesday, July 26, 2016

Awesome, beautiful and not to be missed

Thursday, July 14, 2016

Great for stroller walking! It was a hot day but trail is covered with trees making enjoyable walk.

Tuesday, October 20, 2015

I love this trail. I start from the Day Pond State Park parking lot, and usually take the blue-blazed trail. When it comes to the first big wide opening into the woods, I head straight, and do not immediately follow the blue trail signs. This leads up a few uphills to get your heart going...then it flattens out for most of the rest. There's a nice waterfall, and a few man-made bridges along the way. Trail markings are a bit difficult to spot now and then, but just go back to the most recent one and look around - eventually you'll see it.

horseback riding
Sunday, August 30, 2015

Great beautiful scenery.

i use the East Hampton trail head for this trail. love the river for sceanery (lower trail) bit buggy though. i suppose the water is to thank for that. the actual Airline trail (upper trail) is pretty straight and not much to look at in the area i was in. just lots of woods. there are Munzee tags to find also if thats your thing. i remember jumping off the viaduct in this area when i was in high school. good times. enjoy.

5 miles! It keeps going and going all the way to Willimantic. It's actually more like 20! Then you have to turn around and go back. We actually did a total of 28 miles with a 9 year old and 14 years old and they did it. It was absolutely beautiful and I recommend to all families. Just keep track of the mile markers.

Tuesday, March 05, 2013

This trail isn't great for hiking. It's a wonderful setting for running and biking but if you are looking for a good hike- look elsewhere. Ill come here anyway for a nice walk with friends in the summer! It's also close to some great places to swim in the hot summer months.

trail running
Monday, October 22, 2012

Great place for a run. Wide and flat.

cross country skiing
Sunday, January 01, 2012

What a great resource for everyone - this rail trail actually starts in East Hampton and goes through colchester, Hebron, Lebanon and keeps going. Very level grade so it is great hiking , biking and x country skiing for all ages. Great views from the Lyman viaduct in the spring and fall. Lots of rivers and streams and marshes along the way. You can get off the trail at the Salmon River and fly fish. Get your bike out and enjoy the ride!

Load More