Decatur, Georgia has a humid subtropical climate with hot summers and mild winters. The city is located near the South River, which is a tributary of the Ocmulgee River. As with many metropolitan areas, stormwater runoff is a concern for water quality. Outdoor recreation opportunities in Decatur include several parks such as Glenlake Park and Decatur Square. There are also several miles of trails for hiking and biking, including the PATH Foundation Trail and the Arabia Mountain Trail. The city also has an active community garden program and hosts several events throughout the year, including the Decatur Arts Festival and the Decatur BBQ Blues & Bluegrass Festival.