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2019 Map of Thiells

Name: 2019 Topographic Map of Thiells
Creator: U.S. Geological Survey
Published: 2019
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 2019

About this map

Harriman State Park dominates the northwestern portion of this Rockland County region, where the Ramapo Mountains create a landscape of high ridges and secluded swamps. Peaks like Jackie Jones Mtn and Big Hill overlook a network of water bodies, including Lake Welch and the Third Reservoir. This area preserves a more primitive character compared to the dense residential development to the southeast, noted by the presence of St Johns in the Wilderness Cem set deep within the woods.

South and east of the mountain line, the map transitions into a suburban corridor including Wesley Hills, Spring Valley, and West Haverstraw. The landscape here is shaped by institutions and infrastructure, from the Rockland Community College campus to the sprawling Letchworth Village Cem. Notable historical geographic markers like File Factory Hollow and Horse Stable Rock hint at the area's industrial and colonial past, while the Mahwah River and Minisceongo Creek drainage systems define the local valley floor.