A trail, also known as a path or track, is an unpaved lane or a small paved road not intended for usage by motorized vehicles, usually passing through...

apoptosis-inducing ligand (TRAIL), is a protein functioning as a ligand that induces the process of cell death called apoptosis. TRAIL is a cytokine that is...

The Appalachian Trail, also called the A.T., is a hiking trail in the Eastern United States, extending almost 2,200 miles (3,540 km) between Springer Mountain...

Contrails (/ˈkɒntreɪlz/; short for "condensation trails") or vapor trails are line-shaped clouds produced by aircraft engine exhaust or changes in air...

types of trails: the national scenic trails, national historic trails, national recreation trails, and connecting or side trails. The national trails provide...

The Oregon Trail was a 2,170-mile (3,490 km) east–west, large-wheeled wagon route and emigrant trail in the United States that connected the Missouri...

Oregon Trail in Wiktionary, the free dictionary. The Oregon Trail was a historic migration route across the western United States. Oregon Trail may also...

Indian Trail may refer to: A part of or the whole of the Great Trail created by Native Americans Indian Trail, North Carolina Indian Trails, an intercity...

The Trail of Tears was the forced displacement of approximately 60,000 people of the "Five Civilized Tribes" between 1830 and 1850, and the additional...

body. National Trails are marked with an acorn symbol along the route. In Scotland, the equivalent trails are called Scotland's Great Trails and are administered...