Spotted Lanternfly inUlster County, NYSPOTTED LANTERNFLY GUIDE
Ulster County is a Hudson Valley arts and tourism hub — with Kingston as the county seat — where SLF was confirmed in 2021 and populations are spreading through a diverse landscape of Catskill Mountain foothills, Hudson River waterfront, and an emerging craft beverage industry. The county's growing craft brewing and cider scene includes Keegan Ales in Kingston and Arrowood Farms in the Catskills foothills, both facing SLF pressure on orchard and hop operations. Mohonk Preserve, managed with Nature Conservancy partnership, is an active SLF monitoring site in the Shawangunk Ridge. The Walkway Over the Hudson provides a direct corridor connecting Ulster County populations to Dutchess County across the river.
Highest activity zones
SLF Hotspots in Ulster County, NY
Walkway Over the Hudson (connects to Dutchess County)
Active zone
Mohonk Preserve
Active zone
Catskill Center forests
Active zone
Rosendale Rail Trail
Active zone
Hudson River waterfront at Kingston
Active zone
Primary SLF food source
Tree of Heaven in Ulster County, NY
Tree of Heaven is established along the Hudson River corridor and road margins throughout Ulster County, particularly in Kingston and along Route 9W. The Rosendale Rail Trail and former rail corridors through the county have Ailanthus colonization that extends SLF habitat from the waterfront into the rural interior. Mohonk Preserve edges and the forested approaches to the Catskill Center lands have ToH populations that raise concerns about SLF establishment in ecologically sensitive high-value habitats as populations spread westward from the river corridor.
Identify Tree of Heaven →Local action resources
What To Do in Ulster County, NY
Report a Sighting
Every sighting in Ulster County, NY maps the invasion front. Report directly to NY Department of Agriculture & Markets.
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 NY State Guide
County-level data, quarantine zones, treatment guides, and agency resources for the entire state.
See the full NY guide →Community intelligence
Live Sighting Map
See where SLF has been spotted near you in Ulster County, NY. Add your own sighting to help map the front.
Open the Map →Free weekly fight briefing
Fight SLF in Ulster County, NY.
One email per week. Your zip code. Your threat level. Your action plan. Know exactly what to do this week in Ulster County, NY.