🌤 Weather at Joseph E. Ibberson Conservation Area by season
| Spring | Summer | Fall | Winter |
|---|---|---|---|
| 28–71 °F | 56–84 °F | 32–75 °F | 20–42 °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 Dehart Dam, 6 mi away, elevation 537 ft. Conditions at the park can differ from the station, especially where elevation differs — check a forecast before you go.
🏆 Mountain Wilderness — 350-acre conservation area on Peter’s Mountain — protecting old-growth hemlock ravines and one of the finest wildflower displays in Pennsylvania
Joseph E. Ibberson Conservation Area protects 350 acres on the southern slope of Peter’s Mountain overlooking the Susquehanna River — one of the most botanically rich sites in central Pennsylvania. The conservation area features old-growth hemlock ravines, mountain laurel thickets (Pennsylvania’s state flower!), and over 100 species of wildflowers. Peter’s Mountain is part of the Blue Mountain ridge — the first significant ridge of the Appalachian Mountains west of the Susquehanna. The ridge was the colonial frontier boundary for decades — the Proclamation Line of 1763 ran along it, marking the western limit of legal English settlement.
Visitor Information
| Detail | Information |
|---|---|
| Location | Dauphin County, PA (Peter’s Mountain!) |
| Entry Fee | Free |
| Size | 350 acres — 100+ wildflower species! |
| History | 1763 Proclamation Line boundary! |
About Ibberson
Joseph E. Ibberson Conservation Area in Dauphin County protects 350 acres of pristine old-growth forest on the slopes of Peters Mountain, just 20 miles from Harrisburg. The conservation area is named for a state forester who championed old-growth preservation. The undisturbed forest features massive hemlocks, white pines, and hardwoods — a living example of what Pennsylvania’s forests looked like before the devastating clear-cuts of the 1800s timber era.
Things to Do
Hiking through genuine old-growth forest (rare in Pennsylvania — over 99% was clear-cut by 1900), photography of massive trees, birdwatching for forest-interior species, and reflecting on Pennsylvania’s timber history and forest recovery.
Insider Tips
Appalachian views: Ibberson Conservation Area sits atop Second Mountain in Dauphin County — part of the Ridge and Valley Province with views across the Susquehanna River Valley. Pro tip: The conservation area was a private estate gifted to the state — the meticulously maintained grounds and mature forest feel like a private park. Hawk Mountain nearby: The famous Hawk Mountain Sanctuary — the world’s first refuge for raptors — is nearby on the same mountain ridge.
Best Time to Visit
Fall: Raptor migration and ridge foliage. Spring: Wildflowers on the mountain. Summer: Cool ridge hiking. Winter: Clear valley views.
Frequently Asked Questions
What is Hawk Mountain?
Hawk Mountain Sanctuary (1934) was the world’s first refuge for birds of prey — established when shooting migrating hawks from the ridgeline was common “sport.” Today, 18,000+ raptors (eagles, hawks, falcons) are counted annually during fall migration. Hawk Mountain proved that raptors have ecological value — it helped inspire the raptor protection movement worldwide.
Nearby state parks: If you have extra time, Memorial Lake State Park is a short drive away, and Swatara State Park is within about an hour’s drive.
🌺 Visit Ibberson Conservation Area
100+ wildflower species — colonial frontier boundary of 1763!
Wildlife & Nature
Joseph E. Ibberson CA — on Second Mountain near the Susquehanna River — preserves a mountain-top forest with outstanding views. The park’s hardwood forest, mountain laurel, and wildflower meadows support white-tailed deer, wild turkeys, and ruffed grouse. Broad-winged hawks migrate through. Scarlet tanagers nest.
Nearby Attractions
Halifax — adjacent. Harrisburg — 20 miles south — has the state capitol. Little Buffalo SP — 25 miles west. Stony Creek Valley — adjacent.
🐾 Dogs & Pets at Joseph E. Ibberson Conservation Area
- Pets allowed? statewide rule
- Pets are allowed in day-use areas of Pennsylvania state parks and in designated campground sites, but must be physically controlled, attended at all times and leashed, caged or crated.
- Leash rule statewide rule
- Leash required at all times; no universal maximum length — inquire at the park office (electronic fences/shock collars not accepted as control)
- Beaches & swim areas statewide rule
- Pets are prohibited in swimming areas and designated beaches
- Cabins & lodging statewide rule
- Dogs allowed in a limited number of designated cabins, cottages and yurts (pilot program); maximum two dogs per unit; dogs must be house-trained and current on rabies vaccination
- Pet fees statewide rule
- No standard statewide pet fee; fees may be assessed for damage in dog-friendly lodging
- Statewide exceptions statewide rule
- Maximum two non-caged pets per campsite; pets prohibited in buildings; pet food may not be left outside camping units
Are dogs allowed at Joseph E. Ibberson Conservation Area?
Pets are allowed in day-use areas of Pennsylvania state parks and in designated campground sites, but must be physically controlled, attended at all times and leashed, caged or crated. Individual parks can post stricter rules — check signage on arrival.
Rules verified July 2026 via pa.gov. More: Pennsylvania state parks guide · Dog rules in all 50 states compared
Park Location
Plan your gear for Joseph E. Ibberson Conservation Area
From our editorial guides, matched to this park’s activities:
