Defining the difficulty of a hike is mostly an objective process, but there are a few tested formulas that deduce a numerical value to represent trail difficulty. Below are two of the most common formulas, both of which are used on our site.
Note: Because many trails in the Great Smoky Mountains can be turned into loop hikes, our trail pages only use these formulas to calculate the one way distance based on elevation gain and mileage. Our calculations do not assume round trip distance.
- Abrams Falls Trail (4.2 mi)
- Albright Grove Loop Trail (0.7 mi)
- Alum Cave Trail (Mt. LeConte) (5 mi)
- Andrews Bald via Forney Ridge Trail (1.8 mi)
- Anthony Creek Trail (3.5 mi)
- Appalachian Trail Smoky Mountains Segment (71.7 mi)
- Baskins Creek Trail (2.7 mi)
- Baxter Creek Trail (Mt. Sterling) (6.2 mi)
- Big Creek Trail (Mouse Creek Falls, Midnight Hole) (5.8 mi)
- Bote Mountain Trail (6.6 mi)
- Boulevard Trail (Mt. LeConte) (5.4 mi)
- Bradley Fork Trail (7.3 mi)
- Brushy Mountain Trail (Mt. LeConte) (4.9 mi)
- Bullhead Trail (Mt. LeConte) (5.9 mi)
- Cataract Falls (Fighting Creek, Cove Mountain Trail) (0.5 mi)
- Charlies Bunion via Appalachian Trail (4.2 mi)
- Charlies Bunion via Kephart Prong Loop (14.2 mi)
- Chestnut Top Trail (4.3 mi)
- Chimney Tops Trail (2 mi)
- Clingmans Dome Trail (0.6 mi)
- Cooper Road Trail (10.5 mi)
- Cove Mountain Trail (8.5 mi)
- Cucumber Gap Trail (2.4 mi)
- Dry Sluice Gap Trail (4.2 mi)
- Eagle Creek Trail (8.9 mi)
- Elkmont Nature Trail (0.8 mi)
- Forney Ridge Trail (5.4 mi)
- Gabes Mountain Trail (Hen Wallow Falls) (6.6 mi)
- Gatlinburg Trail (1.9 mi)
- Grapeyard Ridge Trail (7.6 mi)
- Gregory Bald Trail (Gregory Bald) (7.3 mi)
- Gregory Ridge Trail (Gregory Bald) (5 mi)
- Grotto Falls (Trillium Gap Trail) (1.4 mi)
- Hannah Mountain Trail (9.5 mi)
- Hatcher Mountain Trail (2.6 mi)
- Huskey Gap Trail (4.1 mi)
- Jakes Creek Trail (3.3 mi)
- Kephart Prong Trail (2 mi)
- Laurel Falls Trail (4 mi)
- Lead Cove Trail (1.8 mi)
- Little Bottoms Trail (2.3 mi)
- Little Brier Gap Trail (Walker Sisters Cabin) (1.4 mi)
- Little Greenbrier Trail (4.3 mi)
- Little River Trail (6.1 mi)
- Low Gap Trail (5.4 mi)
- Lower Mt. Cammerer Trail (7.4 mi)
- Lumber Ridge Trail (4.1 mi)
- Lynn Camp Prong Trail (3.7 mi)
- Maddron Bald Trail (Albright Grove) (7.3 mi)
- Meigs Creek Trail (3.5 mi)
- Meigs Mountain Trail (6 mi)
- Metcalf Bottoms Trail (0.7 mi)
- Middle Prong Trail (Indian Flat Falls) (4.1 mi)
- Miry Ridge Trail (5 mi)
- Mt. Cammerer Trail via Low Gap + AT (5.6 mi)
- Mt. Sterling Ridge Trail (5.3 mi)
- Newfound Gap to Clingmans Dome (7.7 mi)
- Noland Creek Trail (9.2 mi)
- Old Settlers Trail (15.8 mi)
- Old Sugarlands Trail (3.9 mi)
- Panther Creek Trail (2.3 mi)
- Porters Creek Trail (Fern Branch Falls) (3.7 mi)
- Rabbit Creek Trail (7.8 mi)
- Rainbow Falls Trail (Mt. LeConte) (6.6 mi)
- Ramsey Cascades Trail (4 mi)
- Rich Mountain Loop (8.7 mi)
- Russell Field Trail (3.5 mi)
- Schoolhouse Gap Trail (Whiteoak Sink) (2.1 mi)
- Spence/Russell Field Loop (13.2 mi)
- Spruce Flats Falls Trail (Buckeye) (1 mi)
- Swallow Fork Trail (4 mi)
- Sweat Heifer Creek Trail (3.7 mi)
- Thunderhead Mountain (Rocky Top) (6.1 mi)
- Trillium Gap Trail (Grotto Falls, Mt. LeConte) (8.9 mi)
- Turkeypen Ridge Trail (3.6 mi)
- Whiteoak Sink via Schoolhouse Gap Trail (2.3 mi)
The above list of hiking trails in the Smokies is incomplete and constantly being updated. If you have information or photos you would like to contribute, please contact [email protected]
Paul Petzoldt's "Energy Mile"
Paul Petzoldt, the founder of the National Outdoor Leadership School (NOLS), developed the "Energy Mile" formula for calculating the difficulty level of hike in 1976. He defined one energy mile as the energy required to walk one mile on flat ground. Petzoldt recommended adding two energy miles for each 1000 feet of elevation gained. Factors such as hiker weight and backpack weight create some variance in the difficulty, but Petzoldt's energy mile theory is widely considered one of the most accurate formulas for calculating trail difficulty.
< 5 = Easy
5 - 10 = Moderate
> 10 = Strenuous
Source: The Validity of Petzoldt's Energy Mile Theory
Shenandoah Hiking Difficulty
Another commonly used trail difficulty scale is one developed by Shenandoah National Park in Virginia. The Shenandoah scale offers a wider range of possibilities in defining the difficulty of a hike.
- < 50 = Easiest (suitable for anyone who enjoys walking)
- 50 - 100 = Moderate (suitable for novice hikers)
- 100 - 150 = Moderately Strenuous (challenging for an unconditioned person)
- 150 - 200 = Strenuous (challenging for most hikers)
- > 200 = Very Strenuous (only for well conditioned and prepared hikers)
Source: How to Determine Hiking Difficulty - Shenandoah National Park (U.S. National Park Service)
