Hickory Run State Park

What it is

Hickory Run is the largest state park in the southern [[poconos|Poconos]] and one of the most-visited in [[poconos|Pennsylvania]]. The park encompasses a mosaic of:

• The [[boulder|Boulder]] Field — 16 acres of frost-shattered sandstone boulders, mostly 4 to 8 feet across, packed densely enough to walk across; effectively no soil, no plants. National Natural Landmark (1967).
• 44 miles of hiking trails — through hemlock-hardwood forest, along Hickory Run, Sand Spring Run, and Mud Run
• Three lakes — Sand Spring Lake (swimming), Hickory Run Lake, the smaller pond. All built by the Civilian Conservation Corps in the 1930s.
• Hawk Falls — a 25-foot cascade on Hawk Run
• Historic CCC infrastructure — pavilions, cabins, stonework from the 1930s federal-employment programs

The Boulder Field

The [[boulder|boulder]] field is the [[poconos|Pocono region]]‘s most-photographed geological feature, but its real interest is what it preserves: a periglacial landscape, formed at the edge of (not under) the continental ice sheet. During the Wisconsinan glaciation, the boulder field’s location lay just south of the ice margin, in a permanently frozen tundra zone. Freeze-thaw cycles in the surrounding sandstone bedrock split rock into blocks; meltwater and solifluction (slow downslope flow of water-saturated soil) swept the blocks into the basin where they sit now, packed three feet deep.

Most periglacial [[boulder|boulder]] fields in the eastern U.S. have been overgrown by forest. Hickory Run’s persists because the boulders are too tightly packed for soil to accumulate. It’s a 20,000-year-old landscape preserved as if frozen in time.

Why it’s listed

Public state parks are the durable substrate-protection layer in any bioregion — they outlast funding cycles, ownership changes, and political shifts in a way that private conservation usually doesn’t. Hickory Run protects 16,000 acres of the Pocono southwestern flank in perpetuity, including substantial mature hemlock forest. The CCC-built infrastructure is itself a piece of national heritage.

Bioregional fit

Hickory Run anchors the [[pocono-plateau|Pocono Plateau]]‘s southwestern corner where the plateau drops toward the Lehigh River gorge. It connects ecologically to the Lehigh Gorge State Park (immediately south) and forms part of the broader protected-land matrix that holds the bioregion’s southern edge.

See also

Auto-generated from this entry’s typed relations: frontmatter, grouped by relation type so the editorial signal isn’t flattened.

• Contains: [[pocono-plateau]] · [[eastern-hemlock-forest]]
• Member of: [[place]]
• Contained by: [[poconos]]

Sources

• PA DCNR Hickory Run State Park public materials
• National Natural Landmark Program designation file
• Sevon, W.D., The Hickory Run Boulder Field: [[poconos|Pennsylvania]] Geological Survey (technical description of formation)