Low Gap Trail

Overview

If you like your climbs honest, Low Gap delivers. Starting in Cosby Campground, this steep, switchbacked trail rockets up to the Appalachian Trail at Low Gap and is the park’s shortest path to Mount Cammerer’s iconic stone fire tower. As a standalone through-route, Low Gap runs 5.4 miles end-to-end (2.9 miles from Cosby to the AT, then 2.5 miles down toward Big Creek). Most hikers, though, use it to reach Mount Cammerer: that out-and-back comes in around 11.1 miles total with about 3,149 feet of gain and typically takes roughly 6.5 hours.

Route and Landmarks

From Cosby Campground, the path tracks Cosby Creek upstream over footlogs, passing the Cosby Nature Trail junction. About 0.4 miles in, ignore the Lower Mount Cammerer Trail if your goal is Low Gap—turn right and brace for the real work. The grade steepens, switchbacks stack up, and the tread gets rockier as you leave the creek, even passing a spring that feeds Cosby Creek near the headwaters. After roughly 3 relentless miles and more than 2,000 feet of gain, you top out at Low Gap—a sharp, V-shaped notch—where Low Gap meets the Appalachian Trail.

Heading left on the AT toward Mount Cammerer, the grade eases and winds along the ridge for about 2.1 miles with intermittent peeks into the Cosby and Toms Creek valleys. Around the 5-mile mark from the start, pick up the rugged, roughly half-mile spur to the fire tower. It’s mostly level but expect some rock scrambling near the lookout. The octagonal, CCC-built tower at 4,928 feet gives a 360-degree sweep over Pigeon River Gorge, Snowbird Mountain, Mount Sterling, Big Creek, and a vast sea of Smokies ridges.

Scenery and Seasonal Notes

Low Gap offers a classic Smokies progression: shady eastern hemlocks and moist creekside terrain low down, then cove hardwoods transitioning into an oak-heavy mix as you climb—think pignut hickory, red maple, sourwood, black gum, yellow birch, plus northern and white oak. In early May, watch for a carpet of fringed phacelia around Low Gap. Fall color pops along the whole route; summer brings lush green and, yes, humidity.

Difficulty and Trail Conditions

This is a strenuous hike by Smokies standards. The first three miles from Cosby are steep and sustained with rocky, rooty sections; trekking poles pay off, especially on the descent. The Cammerer spur involves minor scrambling and can be slick when wet or covered in leaves. Expect occasional blowdowns after storms. Bugs can be active in warmer months.

Best Time to Hike

Spring bloom (April–May) and peak fall color are prime. In summer, start early for cooler temps and easier parking; the heat and humidity magnify the effort. Winter and shoulder seasons can leave icy patches on shaded switchbacks—microspikes can be the difference between sketchy and solid.

Logistics and Tips

Park at the Cosby Campground hiker lot; a parking permit is required. Water is typically accessible along the lower mile near Cosby Creek—treat everything. Pets aren’t allowed on this trail. Carry a real map and a compass; the junctions are well signed but long days are smoother when you can confirm progress. If you’re backpacking, secure food properly—this is bear country. Want more than an out-and-back? Low Gap is a key connector for longer loops, including a 16–17 mile circuit from Cosby that tags the AT and Lower Mount Cammerer Trail, or an even bigger 20.8-mile loop from Davenport Gap.

Bottom Line

If you’re chasing big views for big effort, this climb-to-a-tower classic is absolutely worth it. The grade is relentless, but the payoff from Cammerer is among the Smokies’ best.