The city of Glenwood Springs is known for its proximity to the White River National Forest, a haven for outdoor enthusiasts. In addition to offering hiking, biking and camping, the White River area is home to several ski resorts that feature a variety of terrains for beginners and experts alike. The Colorado River also provides several outdoor opportunities, with a number of guide companies located in the region for visitors seeking a whitewater experience. For aerial views of the surrounding area, guests can charter a hot air balloon and get above the peaks. Terrestrial transportation is facilitated by the Roaring Fork Transportation Authority's local bus system, which is free of charge and runs seven days a week. A Christmas concert is held on the second Sunday of December every year, filling the mountains with seasonal music.