🌤 Weather at Fort Harrison State Park by season
| Spring | Summer | Fall | Winter |
|---|---|---|---|
| 32–74 °F | 62–85 °F | 34–77 °F | 20–41 °F |
Each range runs from the coldest monthly average low to the warmest monthly average high in that season (1991-2020 climate normals), measured at Castleton 2 S, 1 mi away, elevation 824 ft. Conditions at the park can differ from the station, especially where elevation differs — check a forecast before you go.
Fort Harrison State Park is a public state park in Indiana near Indianapolis in Marion County. Spanning 1,700 acres and established in 1996, this park offers a peaceful retreat into nature for visitors of all ages.
Quick Facts
| State | Indiana |
| Nearest City | Indianapolis |
| County | Marion |
| Park Size | 1,700 acres |
| Established | 1996 |
| Google Rating | ⭐ 4.6/5 (3100 reviews) |
Location & Getting There
Fort Harrison State Park is located near Indianapolis, Indiana. The park’s coordinates are 39.8756, -86.0364.
Things to Do
Indiana state parks protect the state’s finest natural areas, from sandstone canyons and limestone caves to Lake Michigan dunes and hardwood forests. Activities include hiking through scenic gorges and along rugged canyon trails, swimming at guarded lake beaches, fishing for bass and bluegill, camping in forested settings, exploring large cave networks, mountain biking on developing trail systems, horseback riding on dedicated trails, and birdwatching along major migratory routes. Brown County State Park — “The Little Smokies” — is known for its rugged beauty and stunning fall color.
Best Time to Visit
Fall (October) is peak season, when Indiana’s hardwood forests blaze with orange and red — Brown County and Turkey Run are especially spectacular. Summer (June–August) is ideal for lake swimming, camping, and nature center programs. Spring (April–May) brings peak waterfall flow, morel mushroom hunting, and wildflower hikes. Winter offers peaceful snow-covered trails and special holiday events at park inns.
Visitor Tips
Indiana state parks charge a gate fee ($7 in-state, $9 out-of-state per vehicle). An annual entrance pass ($50) covers unlimited visits. Camping and inn reservations through the Indiana DNR system. Indiana is unique for its historic park inns — full-service lodges with dining inside parks like Turkey Run, Brown County, McCormick’s Creek, and Spring Mill. Reservations for fall weekends at popular parks should be made months in advance.
Explore More Indiana State Parks
Fort Harrison State Park is one of many outstanding state parks in Indiana. Discover more parks in our Best State Parks in Indiana guide, or use our Park Finder to search by activity, location, or features.
Wildlife & Nature
Fort Harrison SP — 1,700 acres — a former WWII military post. The park’s hardwood forest, Fall Creek, and prairie support white-tailed deer, coyotes, and pileated woodpeckers. The Fort Harrison golf course is one of the top public courses in Indiana.
Nearby Attractions
Indianapolis — adjacent — state capital and home of the Indianapolis 500. Lawrence — adjacent.
Nearby state parks: If you have extra time, White River State Park is a short drive away, and Mounds State Park is within about an hour’s drive.
🐾 Dogs & Pets at Fort Harrison State Park
- Pets allowed? statewide rule
- Pets are allowed throughout Indiana state park properties, including trails, but must be on a 6-foot leash or in a cage at all times.
- Leash rule statewide rule
- 6 ft leash applies to the entire property; electric collars/fences do not substitute
- Beaches & swim areas statewide rule
- Pets (except service animals) are prohibited from swimming pools and beaches unless an area is specifically designated for pets
- Cabins & lodging statewide rule
- Designated pet-friendly rooms and cabins at all seven Indiana State Park Inns accept dogs and cats up to 75 lbs, max two pets, for $25 per pet per night
- Pet fees statewide rule
- No day-use pet fee; $25 per pet per night at State Park Inns' pet-friendly rooms/cabins
- Statewide exceptions statewide rule
- At eight reservoir properties (including Patoka, Brookville and Monroe) dogs may be off leash in lawful pursuit of wild animals or in licensed field trials
Are dogs allowed at Fort Harrison State Park?
Pets are allowed throughout Indiana state park properties, including trails, but must be on a 6-foot leash or in a cage at all times. Individual parks can post stricter rules — check signage on arrival.
Rules verified July 2026 via in.gov. More: Indiana state parks guide · Dog rules in all 50 states compared
Park Location
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