Where to go cycling
If you are going it alone, there are a number of easily found
    bicycle rides in Chiang Mai. Below is a selection of suggestions for unguided
    cycling in Chiang Mai. Good luck and have fun! 
    
    Doi Suthep
    
    Start at the zoo and climb 13 kilometers up the front of the mountain to
    the temple. The climb is unrelenting but not too steep. A moderately fit
    rider can do it in just over an hour. If you still have the power, continue
    up another 4 kilometers to the Phuping Palace. It's not recommended to start
    the climb later than 8 am. For the brave, this also makes a nice evening
    ride. Choose an evening with at least a half moon. Start after 8 pm and the
    traffic is minimal.
    
    The Samoeng Ringroad
    
    The Samoeng ringroad loops seventy kilometers around the Doi-Pui national
    park linking Mae Rim (northern Chiang Mai) and Hangdong (southern Chiang
    Mai) via Samoeng. This is a paved dual carriageway with some vicious climbing
    and would take a very fit rider about seven or eight hours to complete the
    loop. An alternative would be to break the ride into two and spend the night
    in Samoeng where restaurants and accommodation is available. 
    
    Huay Tung Tao Reservoir 
    
    Start at the Chiang Mai University front entrance. Ride the canal road north
    to the 700 Years Stadium (which is worth a ride through). Keep following
    the canal past the stadium and look for the signs to the lake. 
    
    The River Ping
    
    Roads follow Chiang Mai's main river on both banks going north and south.
    You shouldn't get lost cycling along the river, but the roads sometimes leave
    the river for a while. If the river is on your right, turn right at every
    junction and you'll stay with it. If it's on your left...well, you get it. 
    
    The Canal Road
    
    Start at Chiang Mai University and follow the canal south for as long as
    you can. Much of the way you can drop off the paved road and ride single
    track next to water. Avoid this road, however, during peak traffic times.