| "A" Minus | Anaconda Hills | | | | |
| "A" Trail | Alamogordo | | | | |
| "P" Trail | Columbia Falls | | | | |
| #131 | Sapphire WSA | | | | |
| #132 | Sapphire WSA | | | | |
| #293 | Lewis And Clark County | | | | |
| #4427 Traverse to Coyote Wall | Catherine Creek Recreation Area (Syncline) | | | | |
| $300 Haircut | Kelly Canyon | | | | |
| 'Lynn' Cutoff | Ward Mountain | | | | |
| (079) | Big Holes | | | | |
| (458) | Central Caribou Highlands | | | | |
| 001 | Canfield Mountain Trail System | | | | |
| 003 | Canfield Mountain Trail System | | | | |
| 005 | Canfield Mountain Trail System | | | | |
| 007 (First) | Bass Lake | | | | |
| 007 (Fourth Tie In) | Bass Lake | | | | |
| 007 (Fourth Tie In) - 7S50O | Bass Lake | | | | |
| 007 (Fourth) | Bass Lake | | | | |
| 007 (Second) | Bass Lake | | | | |
| 007 (Third) | Bass Lake | | | | |
| 011 | Southern Caribou Highlands | | | | |
| 025 Spur Rd | Elkhorn Mountains | | | | |
| 035 Spur Rd | Elkhorn Mountains | | | | |
| 049 Strawberry River | Daniels Summit | | | | |
| 06 Moto Trail | Sawtooth | | | | |
| 06-02 Connector | Sawtooth | | | | |
| 06-04 Connector | Sawtooth | | | | |
| 06-06 Connector | Sawtooth | | | | |
| 06-08 East Moto Trail | Sawtooth | | | | |
| 1-4 | Rock Creek | | | | |
| 10 Gallon Hat | Pattee Canyon | | | | |
| 10 Mountain Division trail | Smuggler Mountain/Hunter Creek | | | | |
| 105A | Mingus Mtn. | | | | |
| 106 | Mingus Mtn. | | | | |
| 10cc | Granby | | | | |
| 10K South | Sandia Mountains - Upper East Side | | | | |
| 12-Horse Trail | Twelvemile | | | | |
| 120A | Hermit Park Open Space | | | | |
| 12N31A | Tahoe Mountain | | | | |
| 12N31A Connector | Tahoe Mountain | | | | |
| 130-Moto Trail | Hood River Northwest OHV Area | | | | |
| 130-Moto Trail | Hood River Northwest OHV Area | | | | |
| 133 Borderline-Moto Trail | Post Canyon | | | | |
| 1330 Bypass | Tanasi Trail System | | | | |
| 135 | Murray | | | | |
| 1356 to Mine trail | Goldfield Mountains | | | | |
| 1513 | The Rattlesnake | | | | |
| 15th Street Public Bike Path | Fallen Leaf | | | | |
| 160 Baby Heads | Hood River Northwest OHV Area | | | | |
| 18E37E Connector | Hartoonian Trails | | | | |
| 18E37N North Connector | Hartoonian Trails | | | | |
| 18E37N South Connector | Hartoonian Trails | | | | |
| 18E37R Alternate I | Hartoonian Trails | | | | |
| 18E37R Alternate II | Hartoonian Trails | | | | |
| 1918 | Mt Lemmon - Upper | | | | |
| 1N12 | Angelus Oaks | | | | |
| 2 Beavers & a Bear | Sawtooth | | | | |
| 2 Mile Road, NF 271, NF 424, NF 2322 | Capital Hill | | | | |
| 2 Upper Lairds Downhill | Western Slope | | | | |
| 21 Road / Red Road | Mt. Bachelor Bike Park | | | | |
| 227 to Carlin Bay | Mt Coeur D Alene | | | | |
| 230 | Sandia Foothills - North | | | | |
| 230 Feet | Wagonhammer | | | | |
| 230A | Sandia Foothills - North | | | | |
| 235 Road Trail #502 | Carr Lake Trails | | | | |
| 264 - West Spruce | Thumb Butte | | | | |
| 264 - West Spruce | Prescott | | | | |
| 27th Street Access | Ogden | | | | |
| 2Bucks | Copper Mountain Resort | | | | |
| 2nd Water Ridge | Diamond Fork | | | | |
| 3 Kaylors Knob Ridge Trail North | Western Slope | | | | |
| 3 P Road | Keystone Resort | | | | |
| 30 Acre | Glorieta Adventure Camps | | | | |
| 302.7 | Missoula | | | | |
| 302.8 | Pattee Canyon | | | | |
| 302.9 | Pattee Canyon | | | | |
| 305 | Sandia Foothills - North | | | | |
| 305A | Sandia Foothills - North | | | | |
| 309 | Granite Basin | | | | |
| 310 Road (Whoops Climb) | Phil's | | | | |
| 315 road connector | Patrick Creek - Smith River | | | | |
| 315 Water Tower Trail | Thumb Butte | | | | |
| 316 Pine Lakes | Thumb Butte | | | | |
| 317 Ridge Top | Thumb Butte | | | | |
| 318 West Trail | Thumb Butte | | | | |
| 325 Firewater | Thumb Butte | | | | |
| 328 Piglet | Thumb Butte | | | | |
| 32e305 (Aspen Drop) | Bishop | | | | |
| 32e309 | Bishop | | | | |
| 332 Javelina | Spence Basin | | | | |
| 338 | Mingus Mtn. | | | | |
| 341 | Sandia Foothills - North | | | | |
| 341 - Hokaygon | Granite Basin | | | | |
| 345 - Mint Wash | Granite Basin | | | | |
| 346 - Willow Connector | Granite Basin | | | | |
| 347 | Granite Basin | | | | |
| 347 (Lower) | Granite Basin | | | | |
| 347 (Lower) | Granite Basin | | | | |
| 347 - Willow | Granite Basin | | | | |
| 347 Acc | Prescott | | | | |
| 348 - Chimbley Water | Granite Basin | | | | |
| 350 | Mingus Mtn. | | | | |
| 350 - Surprise Springs | Granite Basin | | | | |
| 351 - West Lake | Granite Basin | | | | |
| 352 - Mint Wash Connector | Granite Basin | | | | |
| 35E13 (Payson Canyon) | Bishop | | | | |
| 35E310 | Bishop | | | | |
| 366 | Sandia Foothills - North | | | | |
| 36th Chamber | Trestle Bike Park | | | | |
| 371 - Camp 28 | Goldwater Lakes | | | | |
| 372 - Twist and Shout | Goldwater Lakes | | | | |
| 373 - Apple Blossom | Goldwater Lakes | | | | |
| 374 - Hidden Valley | Goldwater Lakes | | | | |
| 38 Special | Grand Targhee Resort | | | | |
| 382 | Prescott | | | | |
| 386 Pine Lake Connector | Thumb Butte | | | | |
| 391 - High Valley Ranch | Thumb Butte | | | | |
| 3rd Water | Diamond Fork | | | | |
| 4 The Boys | Leavenworth Hill | | | | |
| 4-Mile Basin | Anaconda | | | | |
| 40 - Clark Spring | Granite Basin | | | | |
| 403 | Buffalo | | | | |
| 41653 | Peavine Mountain | | | | |
| 425 Pack Trail | Angels Staircase / Uno Peak | | | | |
| 440 Abbreviated | Northern Gallatin Range | | | | |
| 45 Mile Campground Road | Strawberry | | | | |
| 453c Connector | Mt Coeur D Alene | | | | |
| 4613 Rd | Phil's | | | | |
| 48th St. | Medora | | | | |
| 4th July to N Tower | Wagonhammer | | | | |
| 4th of July Creek Rd | Wagonhammer | | | | |
| 4th of July Ridge | Highlands Sno-Park | | | | |
| 4th of July Trail | Icicle Ridge | | | | |
| 4th Water | Diamond Fork | | | | |
| 5-stopper | Arroyo Hondo USFS | | | | |
| 5-Way | Crested Butte Town Trails | | | | |
| 5018 Rd | South Mills River | | | | |
| 505 | Sandia Foothills - North | | | | |
| 51 | Thumb Butte | | | | |
| 51 | Thumb Butte | | | | |
| 6.01 - Moto Trail | Blue Mountain | | | | |
| 63J Road | Telluride | | | | |
| 7 Ball Trail | Bullards Bar | | | | |
| 7.1 | Rock Creek | | | | |
| 700 Bail | Kelly Motorized Trail System | | | | |
| 700DA - an abandoned road bed | Vedauwoo / Blair | | | | |
| 701 Juniper Gate | Spence Basin | | | | |
| 704 Willow Creek | Spence Basin | | | | |
| 705 Happy Ending | Spence Basin | | | | |
| 706 Vista | Spence Basin | | | | |
| 707 Willy Nilly Tractor | Spence Basin | | | | |
| 714 Tunnel Vision | Spence Basin | | | | |
| 715 | Mount Herman | | | | |
| 715 Connector | Mount Herman | | | | |
| 721 Side Kick | Spence Basin | | | | |
| 725 West Side Story | Spence Basin | | | | |
| 728 Russ T Fender | Spence Basin | | | | |
| 729 BLM | Spence Basin | | | | |
| 735 Tatanka | Spence Basin | | | | |
| 735 Willow Creek (lower) | Daniels Summit | | | | |
| 7403 | Leavenworth | | | | |
| 760 Noodle Loop | Spence Basin | | | | |
| 762 Kiowa | Kelly Motorized Trail System | | | | |
| 762-To-707C | Kelly Motorized Trail System | | | | |
| 776 | North Cheyenne Cañon Park | | | | |
| 7th Heaven | Purgatory Resort | | | | |
| 8 Ball Trail (7 Ball to Rebel Ridge) | Bullards Bar | | | | |
| 8 Ball Trail (Campground-Dark Day Rd.) | Bullards Bar | | | | |
| 8 Ball Trail (Dark Day Rd-7 Ball Tr) | Bullards Bar | | | | |
| 8 Ball Trail (Marysville Rd-Schoolhouse CG) | Bullards Bar | | | | |
| 8 Ball Trail (Rebel Ridge to Old Camptonville Rd) | Bullards Bar | | | | |
| 8 Mile Saddle | Lolo | | | | |
| 867-to-Fay | Kelly Motorized Trail System | | | | |
| 8s109 | Bishop | | | | |
| 8th Street MX Trail | Boise Foothills | | | | |
| 9003P | Mingus Mtn. | | | | |
| 911A (Peacemaker) Trail | Corral Canyon OHV Area | | | | |
| 925.1B (Old Horse Trail) | Magnolia | | | | |
| 926F | Magnolia | | | | |
| 9401 J | Thumb Butte | | | | |
| A Quiet Alternative | Goldfield Mountains | | | | |
| A-H Creek | Magic Mountain | | | | |
| A-road | Copper Mountain Resort | | | | |
| A-Road (Center Village) | Copper Mountain Resort | | | | |
| A-Road (west Village) | Copper Mountain Resort | | | | |
| Abbot Creek Nature Trail | Columbia Falls | | | | |
| Abbott Creek Trail | Columbia Falls | | | | |
| Abbott Valley Trail | Columbia Falls | | | | |
| Abercrombie Summit East Approach | Abercrombie Mountain | | | | |
| Abercrombie Summit Trail | Abercrombie Mountain | | | | |
| Abineau Osage Dead End | Kelly Motorized Trail System | | | | |
| Abro Lake Trail | Tobacco Roots | | | | |
| Abro Lake Trail | Tobacco Roots | | | | |
| Access Fire Road | Wenatchee | | | | |
| Access Rd | Twelvemile | | | | |
| Access Rd FR7807 - 029 | Dark Divide | | | | |
| Access Road | Crane Mountain Trails | | | | |
| Access Road | Medora | | | | |
| Access Road | China Peak Mountain Resort | | | | |
| Access Road | Little Belts | | | | |
Trailforks 