K
- Kendal Adventure Zone
- Kendall Katwalk
- Kendall Katwalk
- Kendall Stumps
- Kendrick Peak
- Kendrick Peak
- Kennerdell Long Loop: Down to the River
- Kennerdell Short Loop
- Kenneth Hahn Big Hill Loop
- Kenneth Hahn Ridgeline
- Kenotte
- Kent South Peak | C'est Notre Monde
- Kent's -> Phil's Loop
- Kent's -> Phil's Short Loop
- Kent's -> Phil's Short Loop
- Kepler Track
- Keppel Lookout & Stevenson Falls Trail
- Kepros Mountain
- Kepros Mountain
- Kesch Hut to Grialetsch Hut
- Kesler Peak
- Kessel Run
- Kessler Approach
- Ketchum / Elkhorn Bike Path Loop
- Kettle Moraine Southern Unit Big Loop
- Keweenaw Mountain Lodge Loop
- Keweenaw Point Gravel Ride
- Keweenaw Point Gravel Ride
- Keweenaw Point Trail Ride
- Keyhole Hot Springs
- Keyhole / Last Stash
- Kicking Horse Bike
- Kīholo Bay
- Kilauea Iki Trail and Crater Rim Trail Loop
- Killer B Loop
- Killington Mountain: Jump Start
- Killington-Pico Interconnect
- Kill Me Thrill Me
- Kill Me Thrill Me
- Kill Me Thrill Me
- K-In-A-Day
- Kincaid Beach
- Kincaid Beach
- Kincaid Beach
- Kincaid Beach
- Kincaid Park: Sendy Loop
- Kincaid Park: XC Loop
- Kinder Scout
- Kindersley Pass - Sinclair Creek Loop
- King Arthur
- King Canyon - Gould Mine Loop
- King Creek Ridge | C'est Notre Monde
- Kingdom Trails: Eastern Loop
- King's Couloir
- Kings Creek Falls Loop
- Kingsnake Trail
- Kings Peak
- Kinnekulle Descent
- Kinnekulle Segment
- Kirby's
- Kirketaket
- Kirner's Cornice (aka A-Basin Saddle)
- Kirroughtree Full Red and Black XC
- Kita Shamen (Goshikionsen return)
- Kita Shamen W
- Kit Carson and Challenger Point
- Kit Carson and Challenger Point
- Kit Carson via Outward Bound Couloir
- Kitchen Chute
- Kitchen Wall
- Kitchen Wall
- Kitchen Wall Traverse
- Kitsuma
- Kitsuma Loop
- Kitsuma Loop
- Kitzbühel to Schwarzsee
- Kitzbühler Horn MTB Summit Tour
- Kitzbühler Horn Summit
- Kitzbühler Horn Summit Trail Run
- Kitzsteinhorn – Gaisstein – Maiskogel