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Popular destination for lake fishing, hiking, biking, horseback riding & hunting (by permit).

At a glance

#3 of 4 Tourist attractions in Leonardtown #3 of 5 Parks in Leonardtown

LocalGuideWorld score: 4.60

9.2 km from the center of Leonardtown

Rating breakdown

  • 5 ★70%
  • 4 ★21%
  • 3 ★5%
  • 2 ★2%
  • 1 ★2%
21250 Camp Cosoma Rd, Leonardtown, MD 20650, United States
St. Mary's River State Park, Leonardtown – photo 1
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St. Mary's River State Park, Leonardtown – photo 10
St. Mary's River State Park, Leonardtown – photo 11
St. Mary's River State Park, Leonardtown – photo 12

Quick facts

What is the rating of St. Mary's River State Park?
St. Mary's River State Park is rated 4.6 out of 5 based on 482 reviews.
How does St. Mary's River State Park rank in Leonardtown?
St. Mary's River State Park is #3 of 4 Tourist attractions in Leonardtown by LocalGuideWorld score (rating weighted by number of reviews).
Where is St. Mary's River State Park located?
21250 Camp Cosoma Rd, Leonardtown, MD 20650, United States — 9.2 km from the center of Leonardtown.
How can I contact St. Mary's River State Park?
Phone: +1 301-872-5688 · Website: dnr.maryland.gov
Cristal Rae
Great for a hike or a bike ride!
shawn baughman
Great place for hiking and Biking.
e6bnfo
Great park. Unmanned automated gate. $3 per car for MD residents, $5 for out of state. Military and vets should be free per state regs, but couldn’t figure out how that benefit is obtained at the unmanned gate. Call to the posted ranger number went unanswered. Be great if calls were answered or info posted how to obtain access for mil/vets.
Caleb Henderson
Great place to hike. Entry cost though and only sunrise to sunset.
Cloressa Orr
Great place to walk and exercise. Be aware that the main white trail path is 7.5 miles. For folks that want a challenge, start at the beginning of the white trail path, as that side has more inclines and declines. For folks that want a less challenging walk, take the white trail, but start where the end of the trail comes out to the parking lot. Next, take the lake view path, but make sure you turn back before you get too far back into the woods. Overall, it was a great trail, but it can be very challenging if you are not prepared to walk the full 7.5 miles.
Brian Woodworth
Very nice and well maintained loop trail around the lake with distance markers every 1/4 mile.

Most of the more scenic views of the lake can be reached about a mile from the parking lot by going counter clockwise.

Recently refurbished parking lot area. Credit card payment to enter ($3). Only restroom is at the parking lot.
William Lieberman
Great State Park just north of Saint Mary's City in southern MD. Large lake with a 7.5 mile loop trail. Warning - this is a lake loop, not a lake view trail. There are glimpses of the lake from time to time. However, if you goal on the hike is fantastic lake views, than make sure you start the trail by going left at the start. All of the great lake views will be at the end that way. Trail is very well maintained with mileage markets every quarter mile. There are multiple splits, but they all go back to the main trail. Other warning, only restroom is at the very start of the trail.
Susan Slaney
They really need to keep up with the bathrooms. There are so many gnats and other bugs. Also, need to stock up the lake. It's ok. But, not a place we always go to go fishing. And the park needs to be patrolled more often. And alway boaters, kayaks and canoes to sit at the docks to get their fishing and such taken out or put away
That's what the parking lot is for.

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