[9guy9]

well, if you really plan to take it on mountain bike trails, not just bike paths you will want a tru mtn bike. If your budget is 100, you can either get a new department store bike, that will be new and shiny, but heavy and probably never work 100% correctly. Or buy a older used "real" bike. It will not be shiny and new, but it should have better quality components that if taken car of work correctly.

something like this

http://minneapolis.craigslist.org/hn...692928285.html