C
- Catex
- Cathedral Hills
- Cathedral Lake
- Cathedral Lake
- Cathedral Peak Mountaineer's Route
- Cathedral Rock
- Catherine Creek Arch Loop
- Catherine Creek Mixed Surface Ride
- Catherine Creek Mixed Surface Ride
- Catherine Creek -> Sand Pass Lariat
- Catherine Creek -> Sand Pass Lariat
- Cat Lake Loop
- Cats Tail Uphill
- Cattail Mine Loop
- Cattail Mine Loop
- Cattywumpus & Bear Bones
- Causeway Coast Way, County Antrim
- Cautley Spout and Calf Top
- Cavallina
- Cavanna's
- Cavell Meadows Loop
- Cave Spring Trail
- Cavi
- Cayambe - The highest point on the equator
- Cayoosh - Wendy Thompson Traverse
- Cazacul
- CBC
- CCC Trail
- CCY Route
- CDO Shuttle / Canada Del Oro Trail
- CDT: Bannock Pass (SH-29) to Chief Joseph Pass (MT-43)
- CDT: Benchmark Wilderness Ranch to Summit (US-2)
- CDT: Border Monument Terminus to Waterton Park
- CDT: Chief Joseph Pass (MT-43) to Seymore Lake Campground
- CDT: Copper Mountain (CO-91) to Herman Gulch (I-70)
- CDT: Cuba to Martinez Canyon (US-84)
- CDT: Cumbres Pass (CO-17) to Wolf Creek Pass (US-160)
- CDT: Grand Lake to Rabbit Ears Pass (US-40)
- CDT: Grants to Cuba
- CDT: Green River Lakes CG to Togwotee Pass (US-26)
- CDT: Herman Gulch (I-70) to Grand Lake
- CDT: Homestake (Interstate 90) to MacDonald Pass (US-12)
- CDT: Lewis Lake (US-191) to Targhee Pass (US-20)
- CDT: Lordsburg to Silver City
- CDT: MacDonald Pass (US-12) Rogers Pass (MT-200)
- CDT: Many Glacier Hotel to Border Monument Terminus
- CDT: Many Glacier Hotel to Chief Mountain Terminus
- CDT: Martinez Canyon (US-84) to Cumbres Pass (CO-17)
- CDT: Modoc Road (FS-005) to Bannock Pass (SH-29)
- CDT: Monarch Pass (US-50) to Twin Lakes (CO-82)
- CDT: NM-12 to Pie Town
- CDT: NM-163 to NM-12
- CDT: NM-9 to Lordsburg
- CDT: North Pass (CO-114) to Monarch Pass (US-50)
- CDT: Pie Town to Grants
- CDT: Rabbit Ears Pass (US-40) to Red Mountain TH (WY-70)
- CDT: Rawlins (US-287) to South Pass City (WY-28)
- CDT: Red Mountain (WY-70) to Rawlins (US-287)
- CDT: Rogers Pass (MT-200) to Benchmark Wilderness Ranch
- CDT: Sapillo Campground to NM-163
- CDT: Seymore Lake Campground to Homestake (Interstate 90)
- CDT: Silver City to Sapillo Campground
- CDT: Southern Terminus to NM-9
- CDT: South Pass City (WY-28) to Green River Lakes CG
- CDT: Stony Pass to North Pass (CO-114)
- CDT: Summit (US-2) to Many Glacier Hotel
- CDT: Targhee Pass (US-20) to Modoc Road (FS-005)
- CDT: Togwotee Pass (US-26) to Lewis Lake (US-191)
- CDT: Twin Lakes (CO-82) to Copper Mountain (CO-91)
- CDT: Wolf Creek Pass (US-160) to Stony Pass
- Cecilio's direct line
- Cecilio's steep line
- Cecilio's traverse to plateau line
- Cecret Lake Trail
- Cedar Creek Falls
- Cedar Glades Trail
- Cedar Hill State Park
- Cedar Ridge Preserve
- Cedar Ridge Preserve
- Cedar Rock Mountain