In Kocaeli, which stands out with its mountain bike trails, many routes with different lengths are preferred by mountain bike enthusiasts. These routes are; the Tepecik-İnönü Plateau-Hüseyinli Village-Yuvacık Dam route with a length of 59 kilometers, the route Tepecik-İnönü Plateau-Kıranyurt Plateau-Yuvacık Dam with a length of 59 kilometers, the route of Tepecik-Kıranyurt Plateau-Karpuzdere-Yuvacık Dam with a length of 57 kilometers, and Tepecik-Menekşe Plateau-Yuvacık route with a length of 23 kilometers, the route of Tepecik-Aytepe with a length of 23 kilometers, the route of Tepecik-Menekşe Plateau-İznik with a length of 64.5 kilometers, the route of Aytepe-Menekşe Plateau-Yuvacık with a length of 35 kilometers, and the route of Bıçkıdere with a length of 21 kilometers. The Hill route of the city, with a length of 56 kilometers, the Yuvacık-Menekşe Plateau-İznik route, with a length of 54 kilometers, the Yuvacık-Menekşe Plateau-Kutluca Village-Yuvacık route, with a length of 66 kilometers, the Yuvacık-Menekşe Plateau-Sansarak Village-İznik route with a length of 39 kilometers. Yuvacık-Nüzhetiye Village-Gölcük route, with a length of 58 kilometers Yuvacık-Erikbeli-Ayvazpınar-Gölcük route, with a route of 76.6 kilometers, Yuvacık-Erikbeli- Ayvazpınar-Senaiye-İznik route, 55 kilometers long Kuzuyayla-Eskiyayla-Sultaniye Village-Yuvacık Dam route, 31 kilometers long Kuzuyayla-Karaoluk Plateau-Yuvacık Dam route, 33 kilometers long Kuzuyayla-Altıoluk-Sultaniye Village-Yuvacık Dam route, Kuzuyayla-Altıoluk-Soğucak Plateau-Sapanca route with a length of 40 kilometers, Gölcük İhsaniye-Yalakdere-Altinova route with a length of 47 kilometers, Gölcük İhsaniye-Karamürsel Fulacık-Altınova route with a length of 60 kilometers, Gölcük İhsaniye- Senaiye with a length of 50.5 kilometers. The Iznik route is the Gölcük İhsaniye-Ayvazpınar-Gölcük route with a length of 38 kilometers, the Gölcük İhsaniye-Samanlı Mountains-Ulaşlı route with a length of 35 kilometers, the Gölcük İhsaniye-Samanlı Mountains-İhsaniye route with a length of 55 kilometers and the Kandıra Coastal Road route with a length of 76 kilometers.