Routes
- Blue Tomato - mtb downhill, 2.9 km, ascent 7 m, descent 316 m
- Blue Track– Einsteiger - mtb downhill, operator DIMB e.V., 1.7 km, ascent 21 m, descent 123 m
- Blue Trail - mtb, 2.2 km, ascent 60 m, descent 43 m
- Blue trail - mtb crosscountry, 1 km, ascent 83 m, descent 3 m
- Blue Trail - mtb, network lcn, operator OZ Slobodný bajker, 1.4 km, ascent 20 m, descent 141 m
- Blue Trail - mtb, network lcn, operator MountainBikeNI.com, 3.5 km, ascent 60 m, descent 62 m
- Blue Trail - mtb, 5.3 km, ascent 38 m, descent 47 m
- Blue Trail - mtb, network Wivenhoe Hills, operator seqwater, 4.9 km, ascent 33 m, descent 32 m
- Bluebell - mtb crosscountry, 0.6 km, ascent 0 m, descent 60 m
- Blueberry Hill - mtb, 5.1 km, ascent 53 m, descent 62 m
- Blueberry Line - mtb, network lcn, 1.7 km, ascent 2 m, descent 182 m
- Blueberry Loop - mtb, operator Fellowship of the Wheel, 1.5 km, ascent 7 m, descent 6 m
- Blueberry Swing - mtb, 0.6 km, ascent 6 m, descent 10 m
- Bluebird Loop - mtb, network lcn, 5 km, ascent 35 m, descent 35 m
- Bluebird Trail - mtb, network lcn, 1.6 km, ascent 16 m, descent 26 m
- Bluebird Trail - mtb, network lcn
- Bluegums - mtb, network French Island, operator Parks Victoria
- Blues Groove - mtb, 1.6 km, ascent 163 m, descent 38 m
- Bluetongue - mtb crosscountry, 1 km, ascent 61 m, descent 7 m
- Bluff Trail - mtb, network lcn
- Blumauer Alm - mtb, network lcn, 22.4 km, ascent 450 m, descent 129 m
- Blutopia (blue) - mtb downhill, network Wind Hill Bikepark, 0.7 km, ascent 0 m, descent 55 m
- BMO Circuit VTT n°2 - mtb crosscountry
- BMX banan - mtb, 0.2 km, ascent 2 m, descent 2 m
- Boardwalk - mtb, 0.3 km, ascent 0 m, descent 7 m
- Bob's - mtb, 8 km, ascent 212 m, descent 168 m
- Bobbio - mtb, 4 km, ascent 340 m, descent 4 m
- Bobby Pin Climb - mtb crosscountry, 0.4 km, ascent 7 m, descent 27 m
- Bobcat - mtb
- Bobsled - mtb allmountain, 0.9 km, ascent 0 m, descent 103 m
- Bocca Giumella - Passo Giovo - mtb, network mtb, operator Consorzio Pro Loco Valle di Ledro
- Bocholt Groen - mtb crosscountry, 29.7 km, ascent 75 m, descent 73 m
- Bocholt Rood - mtb crosscountry, 24.4 km, ascent 42 m, descent 42 m
- Bockbach Tour - mtb, operator Land Tirol
- Bockeboda MTB-slinga - mtb
- Bodas - mtb, network lcn, 1.1 km, ascent 12 m, descent 10 m
- Bodenalm - Timmeltal - mtb, operator Tirol
- Bodenalpe - mtb, operator Land Tirol
- Bodenegg - mtb, operator Land Tirol
- Bodinggraben - mtb, network lcn, 18.9 km, ascent 303 m, descent 108 m
- Bodopass - mtb, operator Bikepark Bodetal, 0.6 km, ascent 5 m, descent 56 m
- Boerenhovenroute - mtb, network lcn
- Bogács-Hollóstető kék MTB - mtb, 22.3 km, ascent 202 m, descent 608 m
- Bogs and Logs - mtb, 0.2 km, ascent 3 m, descent 3 m
- Bohoca - mtb, 2.7 km, ascent 52 m, descent 52 m
- Bois d'Abos - mtb, network lcn
- Bois de Haut - mtb, network lcn
- Bois de la Poussière - mtb, network lcn, 7.1 km, ascent 236 m, descent 236 m
- Bois de Pleuven - mtb, network lcn, operator Fédération française de cyclotourisme - Finistère
- Bois des Geais - mtb
- Bois du Geai - mtb, network lcn
- Bois Faudant - mtb downhill, 0.2 km, ascent 0 m, descent 66 m
- Boisé Beaupré - mtb
- Boisé Beaupré - Fatbike - mtb
- Böle polkuverkosto - mtb
- Bolgen-Trail - mtb, 2.2 km, ascent 0 m, descent 311 m
- Bomb Diggity - mtb, network lcn, 1.4 km, ascent 55 m, descent 23 m
- Bon Gripper - mtb, network lcn, 0.5 km, ascent 0 m, descent 31 m
- Bonabé - mtb, network rcn, operator Centre BTT Valls d'Àneu, 35.3 km, ascent 1505 m, descent 1494 m
- Bonaly - Glencorse off road cycle route - mtb, 3.7 km, ascent 116 m, descent 149 m
- Bondi - mtb enduro, network lcn
- Bones - mtb crosscountry, 1.4 km, ascent 49 m, descent 42 m
- Boneyard - mtb allmountain, 1.9 km, ascent 19 m, descent 103 m
- Boneyard Ditch - mtb, network lcn, operator US:AR:Bentonville, ascent 0 m, descent 0 m
- Boneyard Return - mtb, network lcn, 0.1 km, ascent 11 m, descent 0 m
- Bongo Bongo - mtb, network lcn, 1.3 km, ascent 1 m, descent 213 m
- Bonnet Vert - mtb allmountain, 16.5 km, ascent 667 m, descent 662 m
- Bonneval - mtb, network lcn, 12.1 km, ascent 126 m, descent 127 m
- Bonneville Shoreline Trail - mtb
- Boo Boo - mtb, network lcn, 0.7 km, ascent 3 m, descent 3 m
- Boobrook - mtb crosscountry, 2.4 km, ascent 48 m, descent 48 m
- Boomerang - mtb, 1.9 km, ascent 108 m, descent 21 m
- Boomers - mtb, 2.8 km, ascent 68 m, descent 7 m
- Boot Hill MTB Tracks - mtb, network lcn
- Bootlegger's Run Trail - mtb trial
- Bor Hemet Singletrack - mtb, network lcn, 14 km, ascent 138 m, descent 179 m
- Boračko Jezero - mtb freeride, 0.7 km, ascent 22 m, descent 3 m
- Boračko Jezero-Crna Gora-Borašnica-Prenj - mtb allmountain
- Borat - mtb downhill, 1 km, ascent 0 m, descent 234 m
- Borci-Borašnica-Prenj - mtb allmountain, 13.3 km, ascent 567 m, descent 171 m
- Bòrda deth Rei - mtb, network rcn, operator Centre BTT la Val d'Aran, 14.1 km, ascent 687 m, descent 688 m
- Border Line - mtb, network lcn, operator Finale Outdoor Region, 1.6 km, ascent 67 m, descent 153 m
- Border Trail - mtb, 18.7 km, ascent 575 m, descent 566 m
- Borderline - mtb, operator Mountainbike Freiburg, 3.1 km, ascent 10 m, descent 391 m
- Bordius - mtb, network rcn, operator Centre BTT la Val d'Aran, 24.1 km, ascent 1101 m, descent 1102 m
- Bordon Off Road Cycle Trail - mtb crosscountry, network Hampshire Off-Road Cycle Trails
- Bords du Gave - mtb, network lcn
- Borgata Costa - mtb enduro, network lcn, operator Finale Outdoor Region, 0.9 km, ascent 86 m, descent 59 m
- Borgloon Groen - mtb crosscountry
- Borgloon Zwart - mtb crosscountry
- Borland Saddle Route (Fiordland) - mtb crosscountry
- Børnenes Spor - mtb, 0.9 km, ascent 6 m, descent 6 m
- Borntrail - mtb crosscountry, 8.8 km, ascent 333 m, descent 332 m
- Borovnicáš - mtb, network lcn, 0.5 km, ascent 0 m, descent 58 m
- Borsuk - mtb, operator SLoMBA, 1.6 km, ascent 14 m, descent 120 m
- Börzsönyi kék mtb túra - mtb, network rcn, 45.3 km, ascent 710 m, descent 1034 m
- Börzsönyi piros mtb túra - mtb, network rcn
- Börzsönyi piros mtb túra - mtb, network rcn, 8.9 km, ascent 63 m, descent 187 m
- Börzsönyi zöld mtb túra - mtb, network rcn, 20.4 km, ascent 352 m, descent 274 m
- Bosc d'Aubas - mtb, network rcn, operator Centre BTT la Val d'Aran, 6.2 km, ascent 441 m, descent 439 m