Spotted Lanternfly inClinton County, PASPOTTED LANTERNFLY GUIDE
Clinton County — confirmed for SLF in 2019 — is one of Pennsylvania's most rural counties, with Lock Haven as its county seat and Lock Haven University as the county's primary educational institution. The West Branch Susquehanna River Valley provides a natural SLF spread corridor connecting Clinton County to the established infestation zones in Lycoming County to the east and northward. The county's vast Bald Eagle State Forest acreage and primarily rural character mean SLF can establish and expand across large areas before being detected, making early reporting especially critical. Extension resources are limited relative to the county's geographic size, and the Route 220 / I-80 corridor is the primary freight-mediated spread vector driving SLF introduction from established eastern populations.
Highest activity zones
SLF Hotspots in Clinton County, PA
Lock Haven University campus
Active zone
West Branch Susquehanna River valley corridor
Active zone
Bald Eagle State Forest (large tract)
Active zone
Route 220 / I-80 transport corridor
Active zone
Mill Hall borough agricultural margin
Active zone
Primary SLF food source
Tree of Heaven in Clinton County, PA
Tree of Heaven is present along the Route 220 and I-80 corridor margins in Clinton County and along the West Branch Susquehanna River waterway edges. Lock Haven University campus margins and the Mill Hall borough agricultural edges have Ailanthus colonization that provides SLF host habitat in the county's most populated zones. Bald Eagle State Forest access roads and the Susquehanna River valley corridor are the highest-priority monitoring zones in this predominantly rural and forested county where limited detection resources make citizen reporting especially important.
Identify Tree of Heaven →Local action resources
What To Do in Clinton County, PA
Report a Sighting
Every sighting in Clinton County, PA maps the invasion front. Report directly to Pennsylvania Department of Agriculture.
Report Now →Squish on Sight
See a spotted lanternfly? Kill it immediately — it is legal and encouraged in all states. Learn the best kill methods.
Full Fight Guide →Map ToH in Your Block
Tree of Heaven removal cuts off SLF food supply. Add ToH sightings to the community map to guide removal efforts.
View Sighting Map →Statewide resources
Full Pennsylvania State Guide
County-level data, quarantine zones, treatment guides, and agency resources for the entire state.
See the full Pennsylvania guide →Community intelligence
Live Sighting Map
See where SLF has been spotted near you in Clinton County, PA. Add your own sighting to help map the front.
Open the Map →Free weekly fight briefing
Fight SLF in Clinton County, PA.
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