Frederick, located in central Maryland, experiences a humid subtropical climate with hot summers and cold winters. The Monocacy River flows through the city and is a popular destination for fishing, kayaking, and canoeing. The area also has several parks and trails for hiking, biking, and picnicking, including the Catoctin Mountain Park and Gambrill State Park. Outdoor enthusiasts can also visit the Frederick Municipal Forest, a 7,000-acre forest with numerous trails and campsites. Frederick's hydrology constituents include pollutants from stormwater runoff, agricultural and urban areas, and wastewater treatment plants. The city is actively working to reduce these pollutants through various initiatives and programs.