Explore the most popular nature trips trails in Callahan State Park with hand-curated trail maps and driving directions as well as detailed reviews and photos from hikers, campers and nature lovers like you.

One of the longest loops hikes you can do on the south side of Callahan. The trails are well marked and maintained but some of them get very close to roads and neighborhoods, which kinda ruined the nature experience for me at times. You can easily avoid these by taking little short cuts.

Really great place to bring your dog. Our lab always leaves here exhausted after all the swimming and running. Everyone we ran into was extremely friendly and people seemed to be picking up after their canine friends. They include fee trail maps as well as poop bags. Trails are easy to follow, well maintained, we love it here.

mountain biking
15 days ago

No good

hiking
21 days ago

Beautiful nature trails teeming with wildlife. You get a sense of truly being in nature out here in the Sudbury Valley conservation land. Lived in the area my whole life and have just begun exploring the trails here. This is a place for people who truly appreciate nature and wildlife. I passed many mountain bikers on my journey as well as dog walkers. A lot of people enjoy horseback riding on these trails (fresh manure along the trails), but most people are here simply to observe the wildlife that calls the area home. Bring a camera/binoculars, bug spray, and a snack to enjoy by the pond.

Easy Saturday morning run through Callahan! The trails are well marked and clear. My dog loves this park as there are plenty of other dogs for her to play with as we run along the trail. Best to have the map downloaded and refer to it to make sure you are following the correct trail. Or if you are a gambler, just take whatever turn suits your fancy! They all intersect at different points through the park. Enjoy!

walking
1 month ago

I might have started at wrong trail head but didn’t find a pond 1 small steam lots of cars in parking lot decent trails but not much to see

Great loop with moderate elevation gains. Very well marked, but a little confusing at some trail junctions. Mostly stay on Backpacker and Bear Paw with a few exceptions.

Well labeled and easy trail in the beautiful fall weather. We saw ducks, geese, a woodpecker, as well as reddish squirrels and chipmunks.

Very easy short hike. We did acorn trail. We were trying to find Gibbs Mountain loop but we were unable to find the trailhead for it. Lots of dogs off leash!

Great place for a hike with the pooch! I think the last loop on the north side is just a straight there and back on the backpacker trail or a loop on the acorn trail though. I couldn’t find the other side of the loop shown on this apps map.

TONS of dogs not on leashes.

I'm giving this a 5/5 because I'm a dog owner and this is in my top 3 dog parks.
Dogs only have to be on leash in some areas, so it's nice having them run around by the pond with other dogs and close by you on the trails. We return here every few weeks, and neither us nor our dogs are disappointed. The trails are pretty easy to follow, they have free maps at both entrances; the amounts are limited, but they also have a big map you can look at before you go in.
There are some negative comments here about the dogs, but I've never actually seen anyone upset or bothered with them off leash, FYI :)

hiking
8 months ago

Very enjoyable hike, the trail crosses steep hills, mellow valleys, meadow forests and more. All in just 3 miles. Beebe pond is a beautiful and quiet spot. There are almost never any people on the trails in this part of Callahan, making it a great place to be alone with nature. Be sure to bring bug spray. Turn your AllTrails tracker on because the trails beyond Beebe pond are not always marked and it can be easy to wander in the wrong direction.

My friend and I trailered our horses here today. The parking lot was a nice size where we were able to pull in and circle around for an easy exit. There were A LOT of dogs there and although it says leashes are required, not everyone had them and not all of the dogs were respectful of the horses. There were a lot of trails to explore and a lot where we could even trot and canter. Some were rocky and had roots all over but most were fine for the horses. With my horse being so tall, I had to do some ducking to avoid the tree branches but it was gorgeous weather and just enough breeze to keep the bugs away. There is a pond that the dogs can swim in and we took our horses in since it's only about belly deep for them and they could walk right in. It wasn't our favorite place because of the dogs but we'd go back at some point in the future as it's a nice change of scenery.

Pleasant easy trail compared with north Callahan state park, which was much harder

Easy to moderate trail on north side of Callahan. Nice, pleasant place to spend an hour or two. There are lots of side trails and loops that can be added to increase length of hike.

Open, clearly marked trails. Different landscapes to see from forest to meadow to lake-side - mostly shaded. Fun hike with the kids.

Nice trails with some good moderate up and down. Wildflowers, lilly pads, horses, and ferns.

hiking
9 months ago

One of many fun trails at Callahan State Park. Eagle Pond is a beautiful spot. There are some good rocks to sit on, you will probably even see some fish. The trails are very well marked and fun to explore. This is also a good spot to bring your dog for a walk.

Lots of variety in the terrain

An easy-to-moderate 1-1.5 hour loop that takes you past the lovely little Beebe Pond. Trail is well-maintained for the most part. Many confusing junctions, so pay attention to your map or AllTrails. Beautiful open forest crossed by the remains of many old rock walls from when this was farm land in the 19th century.

Backpacker South to Pine Hill Loop to Bear Paw to Broadmeadow St. Great cardio.

trail running
Monday, April 17, 2017

Great place to run especially if you have a dog! They are allowed off leash on most trails, especially the north side.

very nice and moderate walk. I've been going there since I was a child. in my opinion best dog park I've ever been to. on holidays there could be almost a hundred dogs. on a normal nice day there's a good number. big fields for dogs to play in. a sexy green (ew) pond for them to swim in and a few miles of very nice hiking paths. they even have bike paths on the left.

I love the trails and know them by heart I go so often! A pond for pups to splash and frolicking.

Love this spot! tons and tons of trails to explore with some really nice ponds and views. One of the closest places to Boston where you can actually get deep enough into the woods to be completely removed from the noise of the outside world

Great place !!

trail running
Sunday, June 14, 2015

A great place to run with a few small hills. Some parts are a little muddy and it can be a little buggy. You'll need to watch out for unleashed dogs though. It seems like everyone that owns a dog in this area brings them here to play (southern part).

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