DASTA has developed a nice brochure with 9 bicycle trips in & around Nan. The first tour is in Nan city and you will be passing historical buildings & temples of Nan city. Some other tours go the country side nearby Nan. Personally I think that some of the upcountry tours are for experienced bicyclist only. Not to mention the fact that you are riding some roads with much more as little bit traffic from cars & trucks. Be careful!
DASTA supports & encourages sustainable traveling in endorsed provinces all over Thailand.