At 6,643 feet, Clingmans Dome is the highest point in the Great Smoky Mountains National Park. It is the highest point in Tennessee, and the third highest mountain east of the Mississippi. Only Mt. Mitchell (6,684 feet) and Mt. Craig (6,647), both located in Mt. Mitchell State Park in western North Carolina, rise higher. The observation tower on the summit of Clingmans Dome offers spectacular 360 views of the Smokies and beyond for visitors willing to climb the steep half-mile walk to the tower at the top. On clear days views expand over a 100 miles. Unfortunately, air pollution often limits viewing distances to under 20 miles. Clouds, precipitation, and cold temperatures are common at Clingmans Dome. Temperatures at the dome can be 10 -20 degrees Fahrenheit cooler than in the surrounding lowlands. In fact, the cool, wet conditions on Clingmans Dome's summit make the spruce-fir forest that grows there a coniferous rainforest. Proper preparation is essential for a good visit. Dress in layers and be sure to bring a jacket, even in summer. Although Clingmans Dome is open year-round, the road leading to it is closed from December 1 through March 31, and whenever weather conditions require. It's seven miles to the end of Clingmans Dome Road and there are scenic pullouts with endless views of ridges and valleys along the way. The road ends in a large parking area from which a 0.5 mile trail leads to the summit. The trail is paved but steep, and leads to an observation tower on top. Pets and bicycles are not permitted on the paved trail to the observation tower, or on any other trails in the area. A bike rack is located near the beginning of the paved trail to park bikes while walking to the top. You will need to bring a lock with you to secure your bike. Besides the trail to the summit, there are several trails that start on Clingmans Dome Road and parking area. The Appalachian Trail (AT) crosses Clingmans Dome, marking the highest point along its journey from Georgia to Maine. The Forney Ridge Trail leads to Andrews Bald, a high-elevation grassy bald.