Hawlings River
Hawlings River is a tributary of the Patuxent River in Montgomery County, Maryland. The watershed covers an area of about. The waterway was originally called Holland's River. The headwaters of the river originate in the area north of Laytonsville, and the river flows southeast, entering the Patuxent about below the Triadelphia Reservoir. Portions of Hawlings River flow through
Rachel Carson Conservation Park and . Tributaries of the Hawlings River include Mount Zion Tributary, Reddy Branch, Olney Mill Tributary, Gregg Tributary, and James Creek. The river and its tributaries total about of streams.
