Near Kamloops, the Chuwels Mountain area has trails open to dirt biking.
To reach the dirt bike trails at Chuwels Mountain from Kamloops, head south on Highway 5 (aka Coquihalla Highway) to Exit #366. Turn right on Lac Le Juene Road for 25km. Turn right on Chuwels Mountain Road, which is across from Stake Lake Recreation Area, that leads to the trailhead parking.
Overall, Chuwels Mountain is the 22nd most popular dirt bike trail of all 36 dirt biking rides in British Columbia.