Explore the most popular trails in St. Mary's River 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.

Situated at the northern end of the St. Mary's River watershed, the park shows a wide range of habitats, from wooded acres and fields to swamps and small streams. With such a diversity, you can also find many different types of plant and animal species. Check out a map of the area. St. Mary's River State Park is separated into two areas, Sites 1 and 2. The Site 1 area holds the 250 acre St. Mary's Lake. Located along Maryland Route 5, between Leonardtown and Great Mills, at the end of Camp Cosoma Road, the area has become a popular freshwater fishing spot. Several species of fish are common to the lake including largemouth bass, chain pickerel, crappie, bluegill and sunfish. The lake has been designated a trophy bass lake and as such, special fishing regulations may be in effect. Fishermen should check bulletin boards or contact park personnel for details.

hiking
24 days ago

Trail-ran this one. good for walking, hiking, running, biking or horseback. View of the water almost the whole way around. Not much elevation change. Excellent for someone getting into trail running or training for an off-road race. Difficulty: easy

mountain biking
1 month ago

Not easy! Great trail for mountain bikes at moderate difficulty. Lots of roots, lots of small hills. Well maintained trail with several small alternate side trails. Caution approaching bridges, the creeks are steep banked. I’ve found counter clockwise to be best route. The first mile or so gives time for a warmup before the work begins.

the trail is in very good condition even after a strong storm that knocked out a couple trees a few days ago. all of the trees have been cut and cleared off the main trail.

mountain biking
muddy
7 months ago

blowdown
bugs
muddy
over grown
7 months ago

I wouldn't classify this as 'easy', but closer to moderate. I've walked this trail a lot over the years; we only live a few miles from St. Mary's Lake, this trail has come in handy when my sons were young. Lots of biking when the weather is dry, so hikers beware. Bring bug spray year round, I've hiked this trail in the winter and have brought home ticks. I wish there were benches along the way. This is something that has been an ongoing request from area visitors.. If anyone has any influence, it would be appreciated!

blowdown
bugs
muddy
over grown
7 months ago

I wouldn't classify this as 'easy', but closer to moderate. I've walked this trail a lot over the years; we only live a few miles from St. Mary's Lake, this trail has come in handy when my sons were young. Lots of biking when the weather is dry, so hikers beware. Bring bug spray year round, I've hiked this trail in the winter and have brought home ticks. I wish there were benches along the way. This is something that has been an ongoing request from area visitors.. If anyone has any influence, it would be appreciated!

hiking
blowdown
muddy
over grown
8 months ago

Some of the side trails on this recording hardly exist. Nothing that was too challenging, but during tick season it would not have been worth the trouble of exploring the side trails.

Nice trail. We didn’t think we would hike the entire length of the trail but we made it! It was beautiful and quiet though muddy in spots. There were lots of roots, too. The trail was well marked and fairly well maintained. Most of the bicyclists were pleasant but one apparently thought he owned the trail. He really startled me. Thankfully, I was able to get out of his way in time. Autumn seems to be a good time to hike this trail as there were no bugs and the temperature was perfect. I agree with the reviewer who suggested the addition of a few benches. We would’ve welcomed those!

great hiking trails my dog loves that there's water everywhere

mountain biking
Friday, August 17, 2018

lots of roots and mud if you biking it. most of the trail was closed off. not very well maintained.

nice trail, bikes also use it often. quiet park, dogs are allowed, fishing is good. its an easy but long walk, great to make yourself keep going, since its around a lake there is no shortcut back. my friend and I enjoy walking this together. nice workout

running
Sunday, July 01, 2018

Very, very buggy. Was eaten alive. The trail was also quite muddy for extended stretches and many side trails were not marked. It's probably fine for a hike or easy run but not a good place for speed intervals because you will be stopping a lot to navigate mud trenches and figure out which path is the real trail.

Little more than easy. Great hike! Needs some benches along the way.

hiking
Saturday, April 21, 2018

Absolutely love this trail. It was my first long distance hike. Very peaceful and beautiful scenic trails. At the end of the trail you come to this wide open space where I watched the sunset as a reward for finishing.

Brialliant app

Friday, February 23, 2018

Slightly muddy when I went but great park. I wish I brought my mountain bike for this trail. Definitely worth the trip from Richmond.

walking
Thursday, August 10, 2017

I love this trail. 7.5 miles with some hills and lots of roots. Even on busy days you won't see many people on the trail. I like to walk it. Others will run or bike it. The lake is popular with boats with small engines or kayaks. It is watershed so it as a earth dam that is in full sun. All but that 1 mile of this trail is in shade. The park is very clean and a great deal of parking. It can take me from 2.5 to 3 hours to walk so bring water and my be a snack. I try to walk this trail at least once a month.

running
Friday, August 04, 2017

My goto trail area as it so close. In summer much of the lake is not visible due to leaves. Also in summer more difficult to see bikes so stay alert. Still a pretty summer run. Great in the fall and winter. The section of the damn overlooking the lake is very scenic and worth stopping to admire. I run it in 1:45 and I am a .....slow..... runner. Has some roots and I have over the years managed to hit everyone. Minimal wildlife. Sometimes deer, turkeys, and fish jumping. A few snakes, but they stay away from the trail. During the week, you can often "own" the lake and trail to yourself. More traffic on weekend.

Saturday, July 01, 2017

This is a fun easy trail if you have a few hours to spare. Saw lots of frogs/toads, squirrels, and a couple deer! Very green and peaceful!!

Great trail with many outstanding views!

hiking
Sunday, March 26, 2017

Date: 3/26/2017 Nice Hike. Watch out for mountain bikes and tree roots. Nice views of the lake with out leaves on the trees and brushes.

This trail is perfect for about a 2.5 hr activity. There are plenty of fun plank bridges over mud puddles and adorable streams in between root-plenty trail. This is my favorite activity to do on a day off work with the dog! The kids can come too, but depending on their age they may not be able to do the whole loop.

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