12,473 Trails in United States

Trail Name Difficulty Length (mi) Rating City
Isle Du Bois Intermediate difficulty 11.0 **** Pilot Point
Island Meadow Trail (Mill Canyon OHV Trails) difficulty 0.3 Alpine
Island Lake Beginner difficulty 13.0 **** Brighton
Island Creek Trail Beginner difficulty 5.0 *** Pollocksville
Island Center Forest Intermediate difficulty 9.0 **** Seattle
Isabella Landing Trail difficulty 7.0 Orofino
Isaac Heath Trail #40 Intermediate difficulty 1.0 **** Brevard
Isaac Heath Trail (DuPont State Recreational Forest) difficulty 0.7 Brevard
Irwin Trail / #833 Intermediate difficulty 2.0 **** Crested Butte
Irwin Lake Road / #826 Beginner difficulty 3.0 ** Crested Butte
Irvine Ranch Open Space difficulty 15.0 Irvine
Irvine Lake difficulty 4.0 Silverado
Iroquois National wildlife refuge Beginner difficulty 13.0 ** Basom
Ironman (The Canyons Area) Intermediate difficulty 3.0 Park City
Iron Peak Trail #1399 difficulty 3.34 Cle Elum
Iron Mountain: Yellow Loop (Iron Mountain) Intermediate difficulty 4.0 **** Arkadelphia
Iron Mountain Trail Expert difficulty 6.0 ***** Poway
Iron Mountain Trail Beginner difficulty 5 *** Lake Oswego
Iron Mountain Loop Intermediate difficulty 12.0 *** Cisco
Iron Mountain Advanced difficulty 8.0 **** Damascus
Iron Mountain Intermediate difficulty 30 ***** Arkadelphia
Iron Man difficulty 2.4 Park City
Iron Legs Trail Intermediate difficulty 6.0 **** Anniston
Iron Horse Trail Lake Easiest difficulty 5.0 * Du Bois
Iron Hills Trail System difficulty 0 Cedar City
Iron Hill Recreation Area Intermediate difficulty 8.0 **** Newark
Iron Gate Trail (Soaring Eagle Regional Park) difficulty 0.75 Sammamish
Iron Bear Trail #1351 difficulty 5.77 Cle Elum
Irish Hill Advanced difficulty 5.0 **** San Luis Opispo
Irish Hill Intermediate difficulty 6.0 *** Berlin
Irish Death (Galbraith Mountain) difficulty 0.57 Bellingham
Ira Loop difficulty 6.0 Ira
Ira B Melton Intermediate difficulty 3.0 *** Decatur
Ionia State Recreation Area Intermediate difficulty 8.0 *** Saranac
Invictus difficulty 0.81 Snoqualmie
Intrepid (Dead Horse Point State Park) difficulty 0.5 Moab
Into The Clouds difficulty 8.0 Jonesville
Intestine (Galbraith Mountain) difficulty 0.34 Bellingham
Intervale Bike Trail Beginner difficulty 4.0 *** Burlington
Interurban Tr Beginner difficulty 5.96 **** Bellingham
Interstate Power Preserve Intermediate difficulty 5.0 ***** Dubuque
Interplanet Janet (Hand Cut Hollow) Intermediate difficulty 0.32 ***** Bentonville
Intermediate Loop 2 (Hog Run/Harris Lake) difficulty 0.9 New Hill
Intermediate Loop 1 (Hog Run/Harris Lake) difficulty 0.8 New Hill
Interlake SRA difficulty 20.0 Lynnville
Interconnect Trail (Woolly Trails) difficulty 0.6 St. Croix Falls
Insurgent (The Canyons Area) difficulty 1.0 Park City
Instep (Klondike Bluffs) difficulty 0.7 Moab
Inspiration Point (Losee Canyon) difficulty 0.3 Panguitch
Inside Passage (Klondike Bluffs) Beginner difficulty 0.3 *** Moab

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