Routes
- Kamenná stopa - mtb, network lcn, 0.3 km, ascent 15 m, descent 0 m
- Kamenolom - mtb, network lcn, 14.1 km, ascent 455 m, descent 455 m
- Kamieniołom - mtb allmountain, 2 km, ascent 3 m, descent 233 m
- Kammbergalpe-Buchensteinwand - mtb crosscountry, operator Tirol, 5.3 km, ascent 5 m, descent 552 m
- Kammerer Grundalm Tour - mtb, network lcn, 6.9 km, ascent 622 m, descent 22 m
- Kammerer Kreuz Tour M6 - mtb, network lcn
- Kammtour - mtb, network rcn, operator Bikewelt Schöneck
- Kammweg - mtb, network lcn
- Kampenhout Blauw - mtb crosscountry, 19.4 km, ascent 52 m, descent 50 m
- Kampenhout Groen - mtb crosscountry, 16.6 km, ascent 51 m, descent 56 m
- Kampenhout Rood - mtb crosscountry, 14.8 km, ascent 35 m, descent 35 m
- Kampenwand (Gr) - mtb crosscountry, operator Chiemgauer Genuss-Radltouren, 11.6 km, ascent 983 m, descent 89 m
- Kampenwand Runde - mtb crosscountry, operator Chiemgauer Genuss-Radltouren, 22.6 km, ascent 890 m, descent 902 m
- Kampenwand Um. StAlm - mtb crosscountry, operator Chiemgauer Genuss-Radltouren, 36.5 km, ascent 1729 m, descent 1723 m
- Kampsteiner Verbindungsroute - mtb, network lcn, operator Familienarena Bucklige Welt-Wechselland, 2.4 km, ascent 154 m, descent 0 m
- Kanada - mtb, 4.4 km, ascent 61 m, descent 422 m
- Kanada - mtb, network lcn, 0.5 km, ascent 14 m, descent 27 m
- Kanał Bydgoski i Notecki MTB - mtb, network lcn
- Kandleralm - mtb crosscountry
- Kanelkagen - mtb, operator Silkeborg Sti- og Sporbyggerlaug, 0.4 km, ascent 1 m, descent 19 m
- Kanga-Waala-Fox - mtb, network Dinner Plain, 1.1 km, ascent 50 m, descent 1 m
- Kanisfluh "Klassiker" - mtb
- Kapitoshka - mtb downhill, 2.5 km, ascent 11 m, descent 372 m
- Karásek trail - mtb
- Karer See - mtb, network lcn
- Karkonoski Expres Pod Reglami - mtb, network lcn, 19.9 km, ascent 462 m, descent 461 m
- Karlsbader Hütte - mtb
- Karma Trail - mtb, network lcn, operator Finale Outdoor Region, 6.2 km, ascent 180 m, descent 1216 m
- Kärnten Wasserreich - mtb, network lcn, 25.5 km, ascent 1048 m, descent 1045 m
- Karpova XCM 2021 - mtb, network lcn, 4.9 km, ascent 124 m, descent 122 m
- Karrer Alm - mtb, operator Land Tirol, 5.6 km, ascent 0 m, descent 773 m
- Karri Cup 2009 - mtb
- Karri Cup 2012 - mtb
- Karri Cup 2013 - mtb
- Karröster Alm - mtb, operator Land Tirol
- Karseen-Tour - mtb, network lcn
- Karst MTB - mtb crosscountry
- Karwendel Runde - mtb
- Karwendelhaus - mtb, network mtb, operator Tirol, 17.9 km, ascent 850 m, descent 68 m
- Kasermandl-Gsäß - mtb, operator Land Tirol
- Käseroute: Juns – Stoankasern - mtb, 5.9 km, ascent 631 m, descent 0 m
- Kaskády - mtb, 1.6 km, ascent 143 m, descent 0 m
- Kaste 2 - mtb enduro, 2.4 km, ascent 2 m, descent 221 m
- Käswasserweg - Am Kauzenkopf - mtb, network lcn, 2.1 km, ascent 6 m, descent 167 m
- Kaszói kék kerékpár - mtb, network lcn, 7.4 km, ascent 34 m, descent 34 m
- Kaszói piros kerékpár - mtb, network lcn, 16.7 km, ascent 56 m, descent 56 m
- Kaszói sárga kerékpár - mtb, network lcn, 7.8 km, ascent 31 m, descent 31 m
- Kathenrunde - mtb crosscountry, operator Tirol, 15.1 km, ascent 506 m, descent 513 m
- Katinweg - Stabanthütte - mtb, network rcn, operator Land Tirol, 4.5 km, ascent 470 m, descent 25 m
- Katore Jumps - mtb allmountain, 0.6 km, ascent 23 m, descent 35 m
- Katsig Bakker MTB - mtb, network lcn
- Kattenbos Blauw - mtb crosscountry, 5 km, ascent 14 m, descent 16 m
- Kattenbos Groen - mtb crosscountry, 16.3 km, ascent 40 m, descent 41 m
- Kättsätter MTB 7 km - mtb, 6.7 km, ascent 68 m, descent 79 m
- Katzenkopf-Fluder - mtb, operator Land Tirol
- Kaunertal-Falkaunsalm - mtb, operator Land Tirol, 7.1 km, ascent 26 m, descent 721 m
- Kaunzalpe - Geolsalm - Gartalm - mtb crosscountry, operator Tirol
- Kauppi MTB-reitti - mtb
- Kauswagan Trail - mtb crosscountry, 9.6 km, ascent 199 m, descent 193 m
- Kbelský - mtb singletrack, operator Hlavní město Praha, 1.5 km, ascent 17 m, descent 15 m
- Keas bana - mtb crosscountry, 4.2 km, ascent 52 m, descent 52 m
- Kedjan - mtb, network lcn, 0.9 km, ascent 6 m, descent 6 m
- Kegel-Alpha Trail - mtb, network lcn
- Kehlegg-Gschwendtalpe-Bödele - mtb, 7.9 km, ascent 530 m, descent 168 m
- Kehlegg-Weissenfluhalpe - mtb, 8 km, ascent 640 m, descent 91 m
- Kék MTB - mtb, 2.5 km, ascent 34 m, descent 22 m
- kék mtb (Két-bükkfa-nyereg - Pilisszentkereszt) - mtb, network rcn, 2.9 km, ascent 5 m, descent 217 m
- kék mtb (Piliscsaba - Pilisszántó) - mtb, network rcn, 19.9 km, ascent 388 m, descent 518 m
- kék mtb Kemence - mtb, network rcn, 4.4 km, ascent 3 m, descent 63 m
- Kék-hegy MTB - mtb, 5.3 km, ascent 224 m, descent 116 m
- Kék-hegyi összekötő MTB - mtb, 1.5 km, ascent 120 m, descent 0 m
- Kelchalmgraben - mtb crosscountry, operator Tirol, 6.8 km, ascent 3 m, descent 819 m
- Keller MTB Route No. 9 - mtb
- Keller Rad-Aktiv-Route - mtb
- Kellnerrunde - mtb crosscountry, operator Tirol, 11.5 km, ascent 473 m, descent 473 m
- Kemi - mtb, operator Högbo Bruk, 3.6 km, ascent 19 m, descent 19 m
- Ken's Loop - mtb crosscountry, 11.9 km, ascent 153 m, descent 153 m
- Kenda-Line - mtb
- Kennebec Valley Trail - mtb, 23.5 km, ascent 77 m, descent 72 m
- Kennedy's Bush Track - mtb, 3.8 km, ascent 317 m, descent 25 m
- Kennedy's Rush - mtb crosscountry, 0.7 km, ascent 0 m, descent 22 m
- Kep Track - mtb, network rcn
- Kerékpárral a Bükkön át 1. - mtb
- Kerenzerberg Bike - mtb, network lcn, operator Mountainbikeland Schweiz, 22.5 km, ascent 963 m, descent 965 m
- Kerer Alm - mtb, network rcn, 4.9 km, ascent 499 m, descent 14 m
- Kersbrook Horse Trail - mtb crosscountry
- Keskuspuiston maastopyöräreitti - mtb, operator Helsingin kaupunki
- Kettenlussstrecke - mtb, 12.4 km, ascent 313 m, descent 312 m
- Keyhole - mtb crosscountry, 0.3 km, ascent 11 m, descent 0 m
- Keyhole2 - mtb crosscountry, 0.9 km, ascent 4 m, descent 15 m
- Kick Six - mtb, network lcn, 2.3 km, ascent 17 m, descent 15 m
- Kiddens Trail (Blue - moderate) - mtb crosscountry
- Kidman Trail - mtb
- Kids Loop - mtb crosscountry, 0.5 km, ascent 2 m, descent 2 m
- Kids Loop - mtb, network lcn
- Kids Rock - mtb
- Kids Trail - mtb, 0.4 km, ascent 6 m, descent 0 m
- Kidsrunde Buchwald - mtb, network lcn, 7.7 km, ascent 127 m, descent 129 m
- Kienbach-Trail - mtb, network lcn, 1.1 km, ascent 0 m, descent 72 m
- Kienberg Strecke - mtb