Fort O'Brien State Historic Site park
Fort O'Brien State Historic Site
One of the main reasons to visit Fort O'Brien State Historic Site is to explore the well-preserved remains of the fort and its surrounding area. Visitors can see the original earthworks, barracks, and gun platforms that were used by American soldiers during the Revolution.
Other points of interest at the site include the Machias Bay Viewpoint, which offers stunning views of the surrounding coastline and the Machias River, and the onsite museum, which features exhibits and artifacts related to the fort's history.
Some interesting facts about Fort O'Brien State Historic Site include that it was the site of the first naval battle of the American Revolution, and that the fort was attacked and destroyed by British troops in 1814 during the War of 1812.
The best time of year to visit Fort O'Brien State Historic Site is during the summer months, when the weather is warm and the site is open to visitors. Additionally, the site hosts a number of events and activities throughout the year, including reenactments, lectures, and historical demonstrations.
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.
Plan your visit down to the hour
Same weather feed Snoflo's iOS app uses -- updated continuously from NOAA / yr.no.
Next 5 days, hour by hour
Temperature line with weather symbols on top, snow + rain accumulation as columns, humidity as a dotted line.
5-day forecast table
Every 3 hours, broken out across temperature, snow, rain, humidity, and wind.
| Time | Condition | Temp (°F) | Snow (in) | Rain (in) | Humidity (%) | Wind (mps) | Wind dir |
|---|---|---|---|---|---|---|---|
| Loading detailed forecast… | |||||||
15-day temperature & precipitation
Daily temperatures, snow, and rain projected over the next two weeks.
Area campgrounds
Snoflo-tracked campgrounds within reach of Fort O'Brien State Historic Site, with reservations status.
| Campground | Reservations | Toilets | View |
|---|---|---|---|
| Cobscook Bay State Park Campground | ✗ | ✗ | → |
| Cobscook Bay State Park | ✓ | ✗ | → |
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 Fort O'Brien State Historic Site as a favorite, set a custom threshold (precipitation, freezing temperatures, fire-restriction days), and the iOS app will push the moment conditions cross.
About Fort O'Brien State Historic Site
What can I do at Fort O'Brien State Historic Site?
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 Fort O'Brien State Historic Site?
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.
Other parks near here
Snoflo-tracked parks within driving distance of Fort O'Brien State Historic Site.