Park

St Mary's River State Park park

Maryland, USA Potomac watershed 38.251°, -76.501°
Today high
--
Tonight low
--
Nearby campgrounds
1
Nearby POIs
--
Loading current conditions…
Loading next 24 hours…
Loading 7-day outlook…
St Mary's River State Park -- Maryland park
St Mary's River State Park Maryland · Potomac watershed
About this park

St Mary's River State Park

St. Mary's River State Park is located in southern Maryland, spanning over 2,000 acres of natural beauty. There are several compelling reasons to visit this park, including its diverse range of outdoor activities, stunning landscapes, and rich historical heritage.

One of the main attractions of St. Mary's River State Park is its excellent hiking trails. The park offers over 20 miles of well-maintained trails, providing opportunities for hikers of all skill levels to explore the park's picturesque surroundings. These trails wind through dense forests, along the peaceful river, and offer breathtaking views of the Chesapeake Bay.

For nature enthusiasts, St. Mary's River State Park is home to an abundance of wildlife. Birdwatchers can spot various species, including bald eagles, ospreys, great blue herons, and woodpeckers. Additionally, the park's diverse ecosystem supports a variety of plant life, making it an ideal destination for nature lovers.

History buffs will also find points of interest at St. Mary's River State Park. Calvert Cliffs, located within the park, are famous for their fossilized remains dating back millions of years. Fossil hunting is a popular activity, and visitors often discover ancient shark teeth and other prehistoric relics along the cliffs.

Moreover, the park boasts a rich cultural heritage. A significant attraction is the restored Indian Village, which showcases the life and traditions of Native Americans who once inhabited the area. The village offers insights into the history and culture of the Piscataway people, providing visitors with a unique educational experience.

Regarding the best time to visit St. Mary's River State Park, the spring and fall seasons are particularly pleasant. The park's scenic beauty is enhanced by the vibrant colors of blooming flowers in spring and the striking foliage in autumn. The weather during these seasons is generally mild, making it ideal for outdoor activities such as hiking and birdwatching.

To ensure the accuracy of this information, it is advised to verify details across multiple independent sources.
StateMaryland
WatershedPotomac
Latitude38.2513°
Longitude-76.5015°
Land designation

Park & land designation reference

A quick legend for the federal and state land categories Snoflo tracks. Each designation comes with different rules around access, recreation, and resource extraction.

National Park
Large protected natural areas managed by the federal government to preserve significant landscapes, ecosystems, and cultural resources; recreation is allowed but conservation is the priority.
State Park
Public natural or recreational areas managed by a state government, typically smaller than national parks and focused on regional natural features, recreation, and education.
Local Park
Community-level parks managed by cities or counties, emphasizing recreation, playgrounds, sports, and green space close to populated areas.
Wilderness Area
The highest level of land protection in the U.S.; designated areas where nature is left essentially untouched, with no roads, structures, or motorized motorized access permitted.
National Recreation Area
Areas set aside primarily for outdoor recreation (boating, hiking, fishing, often around reservoirs, rivers, or scenic landscapes); may allow more development.
National Conservation Area (BLM)
BLM-managed areas with special ecological, cultural, or scientific value; more protection than typical BLM land but less strict than Wilderness Areas.
State Forest
State-managed forests focused on habitat, watershed, recreation, and sustainable timber harvest.
Bureau of Land Management (BLM) Land
Vast federal lands managed for mixed use -- recreation, grazing, mining, conservation -- with fewer restrictions than national parks or forests.
Detailed forecast

Plan your visit down to the hour

Same weather feed Snoflo's iOS app uses -- updated continuously from NOAA / yr.no.

Hourly detail

Next 5 days, hour by hour

Temperature line with weather symbols on top, snow + rain accumulation as columns, humidity as a dotted line.

Loading hourly forecast…
Deep dive

5-day forecast table

Every 3 hours, broken out across temperature, snow, rain, humidity, and wind.

TimeConditionTemp (°F)Snow (in)Rain (in)Humidity (%)Wind (mps)Wind dir
Loading detailed forecast…
Long-term outlook

15-day temperature & precipitation

Daily temperatures, snow, and rain projected over the next two weeks.

Loading 15-day outlook…
Stay nearby

Area campgrounds

Snoflo-tracked campgrounds within reach of St Mary's River State Park, with reservations status.

Campground Reservations Toilets View
Point Lookout State Park
Around the spot

Plan a longer trip

The closest parks, lakes, fishing spots, and POIs so a park visit can grow into a full weekend.

Responsible recreation & Leave No Trace

Know before you go
Check the operator's site for hours, permit requirements, seasonal closures, and fire restrictions before heading out.
Stay on trail
Stick to marked paths to protect vegetation, prevent erosion, and avoid disturbing wildlife habitat.
Respect wildlife
Observe from a distance, never feed wildlife, and store food securely if camping is permitted on-site.
Pack it in, pack it out
Carry out all trash, food scraps, and gear. Many parks have limited or no trash service.
Leave what you find
Don't take rocks, plants, or artifacts. They make the park what it is for the next visitor.

Set push alerts in the Snoflo app

Save St Mary's River State Park as a favorite, set a custom threshold (precipitation, freezing temperatures, fire-restriction days), and the iOS app will push the moment conditions cross.

FAQ

About St Mary's River State Park

What can I do at St Mary's River State Park?

Most Snoflo-tracked parks support hiking, picnicking, and wildlife viewing. Check the operator's site for activity-specific rules (camping, fishing, paddling, hunting).

How fresh is the weather data?

The hourly forecast updates throughout the day from NOAA / yr.no. Streamflow comes live from USGS streamgauges.

When is the best time to visit?

Use the 15-day temperature & precipitation outlook on this page to plan -- pick a window with comfortable temperatures and low precipitation.

How do I get to St Mary's River State Park?

Tap Directions in the hero above to open driving directions in Google Maps, or Open in map to center the Snoflo interactive map on the park.

Can I get alerts when conditions change?

Yes -- alerts are managed in the Snoflo iOS app. Favorite this park, set a threshold (temperature, precipitation), and you'll get a push the moment it crosses.

More parks

Other parks near here

Snoflo-tracked parks within driving distance of St Mary's River State Park.

Premium feature

Favorites and custom alerts are part of Snoflo Premium. Save parks, set thresholds, and get push notifications when conditions change.

Upgrade to Premium Not now
🔔

Manage alerts in the Snoflo app

Custom push alerts are configured in the iOS app -- favorite this park, set a threshold (temperature, precipitation, fire restrictions), and you'll get a push the moment it crosses.

Open App Store