Routes
- Kiental Route - mtb, operator Wienerwald Tourismus
- Kiental Trail - mtb, operator Wienerwald Tourismus
- Kiesental-Loop - mtb allmountain
- Kiketi - Asureti - mtb, 14.9 km, ascent 302 m, descent 855 m
- Kiki - mtb, network lcn
- Kill Bill 1 - mtb, network lcn, operator Finale Outdoor Region, 0.9 km, ascent 0 m, descent 154 m
- Kill Bill 2 - mtb, network lcn, operator Finale Outdoor Region, 1 km, ascent 0 m, descent 192 m
- Killivippen - mtb
- Kilmaha and New York - mtb crosscountry
- Kilmer Trail - mtb allmountain, 0.5 km, ascent 102 m, descent 0 m
- Kilsbergsturen - MTB 8 - mtb, 38.8 km, ascent 504 m, descent 501 m
- Kinder Parcours - mtb, 0.1 km, ascent 8 m, descent 8 m
- Kinder-Pumptrack-Hahnenklee - mtb, 0.1 km, ascent 0 m, descent 0 m
- Kinderparcours GZ Buchegg - mtb
- Kindla - MTB 4 - mtb
- King Alfred's Way - mtb, network rcn, operator Cycling UK
- King Lizard - mtb, 1.2 km, ascent 20 m, descent 20 m
- King of the Shore - mtb, 0.4 km, ascent 6 m, descent 29 m
- King Tree Spur Trail - mtb crosscountry, 0.8 km, ascent 0 m, descent 6 m
- King Uppu Loop - mtb, network lcn, 9.9 km, ascent 338 m, descent 337 m
- Kings Junction - mtb
- Kinnekulleleden - mtb, network rcn, 44.9 km, ascent 540 m, descent 534 m
- Kintana - mtb
- Kipps Trail - mtb, 6.1 km, ascent 126 m, descent 80 m
- Királyok útja / Kék kerékpár (Pilisszántó - Pilisszentkereszt) - mtb, operator Pilisi Parkerdő Zrt., 2.7 km, ascent 105 m, descent 57 m
- Kirchberg-Runde - mtb, operator Mühlviertler Granitland, 8.5 km, ascent 337 m, descent 338 m
- Kirchberger Rad-Aktiv-Route - mtb
- Kirkford - mtb downhill, 0.5 km, ascent 97 m, descent 0 m
- Kirroughtree Black Loop - mtb crosscountry
- Kitzbüheler Horn - mtb crosscountry, operator Tirol, 9.6 km, ascent 55 m, descent 1008 m
- Kitzbüheler Horn über Raintal - mtb crosscountry, operator Tirol, 12.5 km, ascent 85 m, descent 1118 m
- Kitzsteinhorn - mtb, network lcn, 23.6 km, ascent 1985 m, descent 310 m
- Kivikauden polku - mtb crosscountry
- Kizzas - mtb, 0.2 km, ascent 9 m, descent 0 m
- Kladova hut - Velingrad - mtb, network Alabak, operator Bikearea, 9.6 km, ascent 11 m, descent 877 m
- Klammhöhestrecke - mtb, 37.5 km, ascent 1087 m, descent 1079 m
- Klapotetz Mountainbike Runde - mtb, network lcn
- Klas-Göran - mtb downhill, 0.1 km, ascent 0 m, descent 1 m
- Klášterka - mtb, network lcn, operator Kokořínské stezky z.s., 1.3 km, ascent 10 m, descent 90 m
- Klaunzerberg - mtb, operator Land Tirol
- Klaus-Götzner Moos-Kugelalpe-Fraxern-Orsanka-Klaus - mtb, network lcn, operator Land Vorarlberg, 24.8 km, ascent 1263 m, descent 1253 m
- Klaus-Neukirchner-Runde - mtb, network lcn, operator Förderverein Zwönitztal e.V., 38.2 km, ascent 528 m, descent 528 m
- Klausberg - mtb freeride, 0.2 km, ascent 0 m, descent 6 m
- Klausenberg-Eggenalm - mtb crosscountry, operator Tirol
- Klausenbergrunde - mtb, network rcn
- Klausenwald - mtb, network lcn, operator Tirol, 5.1 km, ascent 75 m, descent 144 m
- Klåveröds blå MTB-led - mtb
- Klåveröds MTB-bana - mtb, 6.2 km, ascent 58 m, descent 59 m
- Kleblealm - mtb, operator Land Tirol, 5.8 km, ascent 11 m, descent 633 m
- Kleinarler Runde SW45 - mtb, network lcn, 24.7 km, ascent 1096 m, descent 1098 m
- Kleinbergalm Runde - mtb, network lcn
- Kleine Compedalrunde - mtb, network rcn, 14.4 km, ascent 556 m, descent 701 m
- Kleine Dias-Runde - mtb, operator Tirol, 11.5 km, ascent 498 m, descent 572 m
- Kleine Drei Berge-Runde - mtb, 6.9 km, ascent 198 m, descent 198 m
- Kleine Ilsestein-Tour - mtb, operator Volksbank-Arena Harz, 23 km, ascent 871 m, descent 871 m
- Kleine Vulkan Runde - mtb, network rcn, operator Vogelsberg-Arena
- Kleiner Susten - Tour - mtb, network lcn, operator Unesco Biosphäre Entlebuch
- Klingas - mtb crosscountry, 0.4 km, ascent 4 m, descent 5 m
- Klingsporn Track - mtb allmountain, 8.3 km, ascent 23 m, descent 972 m
- Klinkenrundan - mtb crosscountry, network lcn, 11.2 km, ascent 244 m, descent 246 m
- Klintholmsporet, hvid - mtb
- Klintholmsporet, Rød - mtb
- Klippitztörl - Tour - mtb, 14.3 km, ascent 71 m, descent 937 m
- Klockan - MTB 10 - mtb
- Kłodzka Czerwona - mtb, network rcn, operator Singletrack Glacenis
- Kłodzka Niebieska - mtb, network rcn, operator Singletrack Glacenis
- Klopky - mtb, ascent 0 m, descent 0 m
- Klopky - mtb, operator AHOJ Bike Park, 0.5 km, ascent 0 m, descent 39 m
- Klöster Kaiser Künstler Tour - mtb, network lcn, 60.3 km, ascent 983 m, descent 982 m
- Klosterhede Mountain Bike Spor - mtb crosscountry, network lcn, 47.4 km, ascent 206 m, descent 202 m
- Klosterreichenbach-Trail-Tour Abkürzung - mtb, network lcn, 0.6 km, ascent 1 m, descent 33 m
- Klučno - mtb, network lcn, operator Kokořínské stezky z.s., 2.6 km, ascent 10 m, descent 54 m
- kmtb Budapest-Jósvafő - mtb, network rcn
- kmtb Királyok útja / Kék kerékpár (Budapest - Hosszú-hegy) - mtb, operator Pilisi Parkerdő Zrt.
- kmtb Királyok útja 3. szakasz (Pilisszentkereszt - Visegrád) - mtb, network rcn, operator Pilisi Parkerdő Zrt., 29.7 km, ascent 678 m, descent 914 m
- kmtb Mátraalmás - Görgő-bikki pihenő - Markazi-kapu - Recsk - mtb, network rcn
- kmtb Nógrádi vár - Királyrét - mtb, network rcn, 6.6 km, ascent 118 m, descent 63 m
- kmtb Pákozd-Ingókövek-Pátka - mtb, network rcn, 10.2 km, ascent 139 m, descent 136 m
- kmtb Pákozd-Sukoró - mtb, network rcn, 9.3 km, ascent 193 m, descent 117 m
- Kmtb Szilvásvárad - Olasz-kapu - mtb, network rcn
- Knapsack XC loop - mtb crosscountry, 6.7 km, ascent 180 m, descent 182 m
- Kneipptour - mtb, 5.6 km, ascent 104 m, descent 104 m
- Knektleden - mtb crosscountry
- Knesselare Groen - mtb, 32.7 km, ascent 95 m, descent 97 m
- Knife Edge Trail - mtb, network lcn, operator Los Alamos County, 2 km, ascent 3 m, descent 53 m
- Knip-Elljusspår - mtb allmountain
- Knotty Pine Mountain Bike Trail - mtb, network lcn, 1.7 km, ascent 24 m, descent 5 m
- Knyttestigen - mtb, network lcn, 0.9 km, ascent 4 m, descent 4 m
- Koala - mtb crosscountry, 0.5 km, ascent 0 m, descent 38 m
- Koala - mtb crosscountry, 0.3 km, ascent 9 m, descent 0 m
- Koala - mtb crosscountry
- Kobernausserwald MTB Arena - mtb, network rcn, operator ARGE Mountainbike Arena Kobernausserwald
- Kobernausserwald MTB Arena Verbindung - mtb, network rcn, operator ARGE Mountainbike Arena Kobernausserwald
- Kobingerhütte - mtb crosscountry
- Kočičina - mtb, network lcn, operator Kokořínské stezky z.s., 2.6 km, ascent 19 m, descent 64 m
- Koffeinkicken - mtb, 0.8 km, ascent 123 m, descent 0 m
- Kogelberg-Strecke - mtb, network lcn
- Kögele Hütte - mtb, network lcn, operator Land Tirol, 2.1 km, ascent 159 m, descent 2 m
- Köglalm - mtb, operator Tirol, 5.6 km, ascent 27 m, descent 460 m
- Kohlbachtrail - mtb