Rama 9
The closest place to Bangkok to do road riding is Rama 9. Directions to get to cafe: Take Chonburi Motorway 7 to Rom Kla exit (just to the left of exit for Suvarnabhumi airport). Turn left onto the service road (back in the direction you were just traveling) and then turn right (approx. 2.5 km back) onto a side road. There’s a huge RK Park billboard on the corner. The cafe is about 200m on the left.
Bangkok Hash House Bikers
If you would like to go mountain biking once a month somewhere 2-3 hours drive out of Bangkok check out the Bangkok Bike Hash (www.bangkokbikehash.org)