The route begins with the popular Congress Grove Trail. "The Congress Trail is a popular paved loop that starts at the General Sherman Tree, the largest in the world, and goes about a mile south to an impressive collection of immense sequoias, a few of which look just as big as the Sherman Tree, and some unusual clusters of sequoia," according to RedwoodHikes.com. Since trail is easily the best place to enjoy spectacular groves of Sequoias in Sequoia National Park, it is exceedingly popular.

While the entire Congress Grove (split into the House and the Senate) is spectacular, the towering General Sherman Tree is the focal point of, arguably, the entire national park. "The General Sherman Tree is the world's largest tree, measured by volume," according to the NPS. "It stands 275 feet (83 m) tall, and is over 36 feet (11 m) in diameter at the base. Sequoia trunks remain wide high up. Sixty feet above the base, the Sherman Tree is 17.5 feet (5.3 m) in diameter."

Once you depart the Congress Grove Trail and head for the more remote (respectively) reaches of the Giant Forest Loop, the crowds will thin out significantly. Even though you'll leave the crowds behind, the towering sequoias will be your constant companions for many miles. In the farthest reaches of the loop, you'll pass other notable sights, including Tharp's Log Cabin and Crescent Meadow.