| North Halfmoon Lakes Trail | CO | 2.7 mi | 1,527 ft | race | — |
| Indian Run Trail #1210.1 | CO | 3.0 mi | 929 ft | race | — |
| Ruby Jewel Trail | CO | 2.5 mi | 1,582 ft | route | — |
| Niwot Loop - Upper Section | CO | 2.5 mi | 239 ft | route | — |
| Swift Creek Trail #1351 | CO | 2.5 mi | 1,343 ft | route | — |
| Lincoln Mountain Loop | CO | 2.5 mi | 304 ft | route | — |
| Columbus Basin | CO | 2.5 mi | 1,194 ft | route | — |
| Sterry Lake Trail #2240 | CO | 2.5 mi | 859 ft | route | — |
| Star Lily Connector #9623 | CO | 2.5 mi | — | route | — |
| Horizon Tributary Trail | CO | 2.5 mi | 160 ft | route | — |
| Palisade Meadows Trail #651 | CO | 2.5 mi | 1,165 ft | route | — |
| Drop Off Trail #2726 | CO | 2.5 mi | 51 ft | route | — |
| South Fork Trail #1827 | CO | 2.5 mi | 179 ft | route | — |
| Red Mesa Loop | CO | 2.5 mi | 352 ft | route | — |
| Garfield/Grizzly Peak Southeast Approach | CO | 2.5 mi | 2,076 ft | route | — |
| Lilly Gulch Trail | CO | 2.5 mi | — | route | — |
| Sawmill Loop Trail | CO | 2.5 mi | 278 ft | route | — |
| Ridge Line Trail #1494 (Igloo Peak) | CO | 2.5 mi | 993 ft | route | — |
| Custer Draw Trail | CO | 2.5 mi | 570 ft | route | — |
| Middle Supply Trail #123 | CO | 2.5 mi | 617 ft | route | — |
| Elk Creek Trail #5407 | CO | 2.5 mi | 620 ft | route | — |
| Williams Fork Lake Trail #664 | CO | 2.5 mi | 1,395 ft | route | — |
| Cuchillo | CO | 2.5 mi | 266 ft | route | — |
| Drowsy Water Trail #37 | CO | 2.5 mi | — | route | — |
| Middle Creek Trail #1388 | CO | 2.5 mi | 831 ft | route | — |
| Vega Trail | CO | 2.5 mi | 114 ft | route | — |
| Dome Rock Trail #1387 | CO | 2.5 mi | 1,435 ft | route | — |
| Highline Loop | CO | 2.5 mi | 214 ft | route | — |
| FSR 659 | CO | 2.5 mi | 710 ft | route | — |
| Horsetooth Rock Trail | CO | 2.5 mi | 1,279 ft | route | — |
| South Derby Trail #1857 | CO | 2.5 mi | 436 ft | route | — |
| First Notch Trail #710 | CO | 2.5 mi | 252 ft | route | — |
| Pyramid Peak Trail | CO | 2.5 mi | 3,818 ft | route | — |
| Campion Trail | CO | 2.5 mi | 649 ft | route | — |
| Lookout Mountain Trail | CO | 2.5 mi | 711 ft | route | — |
| Little Sand Creek Lakes Trail | CO | 2.5 mi | 2,159 ft | route | — |
| French Creek Trail #703 | CO | 2.5 mi | 292 ft | route | — |
| Ute Creek Cutoff #2659 | CO | 2.5 mi | 256 ft | route | — |
| Old Transfer Bike Trail #6251 | CO | 2.5 mi | 184 ft | route | — |
| Lion Canyon Trail #1329 | CO | 2.5 mi | 1,486 ft | route | — |
| Lakeview Campground Trail #9621 | CO | 2.5 mi | 579 ft | route | — |
| Racoon Trail | CO | 2.5 mi | 458 ft | route | — |
| Trail #1435 | CO | 2.5 mi | 424 ft | route | — |
| Upper Browns Creek 4x4 | CO | 2.5 mi | 1,371 ft | route | — |
| Hare Trail #1199 | CO | 2.5 mi | 1,005 ft | route | — |
| Lily Pad Lake Trail #50 | CO | 2.5 mi | 268 ft | route | — |
| Haymeadow Trail #2123 | CO | 2.5 mi | 1,189 ft | route | — |
| Crank 'n Hammer | CO | 2.5 mi | 161 ft | route | — |
| Trappers Trail | CO | 2.6 mi | 150 ft | route | — |
| Red Rocks Park Loop | CO | 2.6 mi | 208 ft | route | — |
| Clampett Mill Trail #174 | CO | 2.6 mi | 424 ft | route | — |
| Lower Capitol Creek Trail | CO | 2.6 mi | 700 ft | route | — |
| Gray's Peak via Horseshoe Basin Trail #260.2b | CO | 2.6 mi | 2,886 ft | route | — |
| Walrod Cutoff Trail 418 (Caves Loop) | CO | 2.6 mi | 463 ft | route | — |
| Pine Plantation Trail #8825 | CO | 2.6 mi | 506 ft | route | — |
| Firebox Trail #6245 | CO | 2.6 mi | 1,071 ft | route | — |
| Chapman Drive | CO | 2.6 mi | 950 ft | route | — |
| Bluffs Regional Park Trail | CO | 2.6 mi | 325 ft | route | — |
| East Harvard Gulch Trail | CO | 2.6 mi | 15 ft | route | — |
| Mt. McConnel Trail #992 | CO | 2.6 mi | 693 ft | route | — |
| Elk Park #8800A | CO | 2.6 mi | — | route | — |
| Butler Gulch | CO | 2.6 mi | 1,347 ft | route | — |
| Corbett Trail #6209 | CO | 2.6 mi | 1,665 ft | route | — |
| Crater Lake Trail #8800 | CO | 2.6 mi | 235 ft | route | — |
| Lake Ridge Lakes Trail #2093 | CO | 2.6 mi | 674 ft | route | — |
| Monarch Spur Trail | CO | 2.6 mi | 147 ft | route | — |
| Upper Upper Loop | CO | 2.6 mi | — | route | — |
| North Park Trail | CO | 2.6 mi | 180 ft | route | — |
| Piece O' Cake | CO | 2.6 mi | 1,280 ft | route | — |
| The Bluff #5129 | CO | 2.6 mi | 408 ft | route | — |
| Sandy Wash Trail | CO | 2.6 mi | — | route | — |
| Pearl Creek Trail #950 | CO | 2.6 mi | — | route | — |
| Shadyside Trail | CO | 2.6 mi | 365 ft | route | — |
| Riverside Park Outer Loop | CO | 2.6 mi | — | route | — |
| Ponderosa Loop | CO | 2.6 mi | 192 ft | route | — |
| Bald Mountain Tie-In #8882 | CO | 2.6 mi | — | route | — |
| Old Wilson Mesa Trail #5423 | CO | 2.6 mi | 659 ft | route | — |
| McKenzie Gulch Trail #1869 | CO | 2.6 mi | — | route | — |
| ZK Spring Trail #5124 | CO | 2.6 mi | 40 ft | route | — |
| Molly Moon Trail #991-2 | CO | 2.6 mi | 105 ft | route | — |
| Wonderland Creek Path | CO | 2.6 mi | — | route | — |
| Bonnett Creek Trail #1300.B | CO | 2.6 mi | — | route | — |
| Mill Creek Waterline Trail | CO | 2.6 mi | 377 ft | route | — |
| Ruby Wash Trail | CO | 2.6 mi | — | route | — |
| Big Creek Scout Trail #638 | CO | 2.7 mi | 693 ft | route | — |
| Big Ridge Cutoff #2228 | CO | 2.7 mi | — | route | — |
| Little Creek Trail #2655 | CO | 2.7 mi | 819 ft | route | — |
| Nolan Lake Trail #1898 | CO | 2.7 mi | 1,441 ft | route | — |
| Skyline Trail #9465 | CO | 2.7 mi | — | route | — |
| FS Road #704.4D1 | CO | 2.7 mi | 643 ft | route | — |
| Soda Ridge Trail | CO | 2.7 mi | 171 ft | route | — |
| Nottingham and Swift Gulch Path | CO | 2.7 mi | 300 ft | route | — |
| Beaver Creek Recreation Path | CO | 2.7 mi | 566 ft | route | — |
| Hunters Creek Trail #9410 | CO | 2.7 mi | 1,241 ft | route | — |
| Beasway Trail | CO | 2.7 mi | 197 ft | route | — |
| Winnegar Ridge Trail #359.1B | CO | 2.7 mi | 735 ft | route | — |
| Fryin Pan Basin #1127.1 | CO | 2.7 mi | 632 ft | route | — |
| Paradise Creek Trail #54.1 | CO | 2.7 mi | 422 ft | route | — |
| Seldom Seen | CO | 2.7 mi | 230 ft | route | — |
| Sneve Gulch Trail #1872 | CO | 2.7 mi | 1,665 ft | route | — |
| Big Park Trail #6234 | CO | 2.7 mi | 388 ft | route | — |
| Valley Trail | CO | 2.7 mi | 128 ft | route | — |
| East Basin Trail #6106 | CO | 2.7 mi | 570 ft | route | — |
| Rock Of Ages Connector #5408 | CO | 2.7 mi | 167 ft | route | — |
| Salt Lick Trail | CO | 2.7 mi | 991 ft | route | — |
| K-Lynn Cameron Trail | CO | 2.7 mi | 344 ft | route | — |
| Elk Park Trail #118.1 | CO | 2.7 mi | 1,108 ft | route | — |
| North Supply Loop #124 | CO | 2.7 mi | 13 ft | route | — |
| Bear Creek Trail #1206.1 | CO | 2.7 mi | 1,555 ft | route | — |
| Holy Cross Trail | CO | 2.7 mi | 131 ft | route | — |
| Burnett Creek Trail #641 | CO | 2.7 mi | 34 ft | route | — |
| State Highway 93 Trail | CO | 2.7 mi | 285 ft | route | — |
| Hunkidori Mine Road #276.1 | CO | 2.7 mi | — | route | — |
| First Notch Trail #708 | CO | 2.7 mi | 520 ft | route | — |
| Meyer's Homestead Trail | CO | 2.7 mi | 733 ft | route | — |
| Deep Creek Lake Trail #8824 | CO | 2.7 mi | — | route | — |
| Trail Creek Trail #8872 | CO | 2.7 mi | 65 ft | route | — |
| Dally | CO | 2.7 mi | 1,361 ft | route | — |
| Revolution | CO | 2.7 mi | 190 ft | route | — |
| Mount Esther Trail #754 | CO | 2.7 mi | 1,488 ft | route | — |
| Snowshoe Hare Trail | CO | 2.7 mi | 575 ft | route | — |
| Gill Trail #2666 | CO | 2.7 mi | 149 ft | route | — |
| Lower Chutes & Ladders | CO | 2.7 mi | 152 ft | route | — |
| Road 3585 | CO | 2.7 mi | 300 ft | route | — |
| West Fork Trail #6240 | CO | 2.8 mi | 141 ft | route | — |
| Pipeline Trail (#668) | CO | 2.8 mi | 1,147 ft | route | — |
| Cascade Creek Trail #9468 | CO | 2.8 mi | 1,728 ft | route | — |
| Oliver Creek Trail #1147.1A | CO | 2.8 mi | 597 ft | route | — |
| Stove Gulch Trail #2278 | CO | 2.8 mi | 280 ft | route | — |
| Blue Dot Trail (#606.1) | CO | 2.8 mi | 246 ft | route | — |
| La Fair Trail #2668 | CO | 2.8 mi | 124 ft | route | — |
| Eaglesmere Trail #61 | CO | 2.8 mi | 1,519 ft | route | — |
| Richmond Trail #6250 | CO | 2.8 mi | 1,186 ft | route | — |
| Rim Trail | CO | 2.8 mi | 127 ft | route | — |
| Ben Lowe Trail #6109 | CO | 2.8 mi | 17 ft | route | — |
| South Fork Loop Trail | CO | 2.8 mi | 244 ft | route | — |
| PHQ Hill Climb | CO | 2.8 mi | 1,182 ft | route | — |
| Gramps Trail #657 | CO | 2.8 mi | 439 ft | route | — |
| Boulder Reservoir Trail | CO | 2.8 mi | 35 ft | route | — |
| 738.2B (Brush Creek 4wd spur) | CO | 2.8 mi | 910 ft | route | — |
| 10th Mountain Hut Via CT #1512 | CO | 2.8 mi | 575 ft | route | — |
| No Name Lake Trail #728 | CO | 2.8 mi | 577 ft | route | — |
| Babcock Hole Trail #1364 | CO | 2.8 mi | 236 ft | route | — |
| Mee Canyon Trail | CO | 2.8 mi | — | route | — |
| Blue Sky Loop | CO | 2.8 mi | 321 ft | route | — |
| Navajo Ridge Trail #8857 | CO | 2.8 mi | 1,232 ft | route | — |
| Blanca Peak Trail | CO | 2.8 mi | 2,525 ft | route | — |
| Spring Creek Trail | CO | 2.8 mi | 975 ft | route | — |
| Bakers Tank Trail | CO | 2.8 mi | 499 ft | route | — |
| Sweetwater Canyon Trail | CO | 2.8 mi | 216 ft | route | — |
| Massey Branch Trail #2618 | CO | 2.8 mi | — | route | — |
| Jud Wiebe Trail | CO | 2.8 mi | 1,139 ft | route | — |
| Wild Turkey Trail | CO | 2.8 mi | 239 ft | route | — |
| Lou Creek Trail #6222 | CO | 2.8 mi | 980 ft | route | — |
| Boundary Road Connector #264.1 | CO | 2.8 mi | 496 ft | route | — |
| Greyrock Meadows Trail #947 | CO | 2.8 mi | 1,378 ft | route | — |
| Lamba Chops | CO | 2.8 mi | 419 ft | route | — |
| Beckwith Pass Trail #8842 | CO | 2.8 mi | 389 ft | route | — |
| Unknown Creek Trail #866 | CO | 2.8 mi | 823 ft | route | — |
| Dominguez Cutoff #2629 | CO | 2.8 mi | — | route | — |
| Balanced Rock Rd. | CO | 2.8 mi | 1,027 ft | route | — |
| Ditch Road | CO | 2.8 mi | 1,403 ft | route | — |
| Cuerno Verde | CO | 2.8 mi | 11 ft | route | — |
| Cherry Creek Trail #1037.1 | CO | 2.8 mi | 950 ft | route | — |
| No Name Trail | CO | 2.8 mi | 77 ft | route | — |
| Sidewinder Trail #1226.1A | CO | 2.8 mi | 627 ft | route | — |
| Cutler Creek Trail #6217 | CO | 2.8 mi | — | route | — |
| Sunset Rocks Trail | CO | 2.8 mi | 54 ft | route | — |
| Old Dirty Bismark | CO | 2.8 mi | 130 ft | route | — |
| Onahu Creek Trail | CO | 2.9 mi | 876 ft | route | — |
| Bodfish | CO | 2.9 mi | 166 ft | route | — |
| Horizon Loop Trail #701 | CO | 2.9 mi | 323 ft | route | — |
| Muddy Creek Trail #2172.1A | CO | 2.9 mi | — | route | — |
| Louies Loop Trail #660 | CO | 2.9 mi | 99 ft | route | — |
| Trail 409.5 | CO | 2.9 mi | 34 ft | route | — |
| Lori Cohen Memorial 5K Trail | CO | 2.9 mi | 341 ft | route | — |
| Cottonwood Trail #6103 | CO | 2.9 mi | 419 ft | route | — |
| Rosebud Trail | CO | 2.9 mi | — | route | — |
| Creekside Trail | CO | 2.9 mi | — | route | — |
| Limbaugh Canyon Trail #756 | CO | 2.9 mi | — | route | — |
| Mica Basin Trail #1162 | CO | 2.9 mi | 1,360 ft | route | — |
| Chainsaw | CO | 2.9 mi | 303 ft | route | — |
| Red Lake Cutoff #733.2 | CO | 2.9 mi | 171 ft | route | — |
| Red Elephant FDR #211 | CO | 2.9 mi | 121 ft | route | — |
| Bent Rock Trail | CO | 2.9 mi | 209 ft | route | — |
| South W Trail #2060 | CO | 2.9 mi | 68 ft | route | — |
| Trap Park Trail #995 | CO | 2.9 mi | 575 ft | route | — |
| Sawtooth Trail #828 | CO | 2.9 mi | 1,836 ft | route | — |
| Aqua Fria Trail #1229.1 | CO | 2.9 mi | 1,090 ft | route | — |
| Sallie Barber Road | CO | 2.9 mi | 371 ft | route | — |
| Pipeline Trail | CO | 2.9 mi | 159 ft | route | — |
| Redneck Ridge Trail | CO | 2.9 mi | 13 ft | route | — |
| Upper North Mesa Trail | CO | 2.9 mi | 858 ft | route | — |
| Sand Gulch USFS 124 | CO | 2.9 mi | 40 ft | route | — |
| Winter Camp Trail #2645 | CO | 2.9 mi | 400 ft | route | — |
| Short Point Bench Trail #2651 | CO | 2.9 mi | 648 ft | route | — |
| Turrets and River Bench Trails | CO | 2.9 mi | — | route | — |
| Mount Sopris Trail | CO | 2.9 mi | 2,690 ft | route | — |
| Cottonwood Trail | CO | 2.9 mi | — | route | — |
| Crum Reservoir Trail #2511 | CO | 2.9 mi | — | route | — |