Best Beginner mountain bike?

[kyle]

I'm looking into getting into mountain biking. I want to get a decent used bike, maybe 500-600 dollars. I know the best thing to do to determine the right size is to go to a shop, but I just want to get some idea before I go. I'm 5'10 and 165 pounds, with about a 31" inseam length. Can anyone recommend a frame size for me, as well as a few good beginner's brands of bikes?

 

[King D]

To determine the correct size- stand straddling the bar (not the seat). You should be able to lift the bike at least a few inches straight up before it hits your junk. If you are between sizes, I would go smaller rather than bigger for mountain biking because the bike will be a bit lighter and easier to handle. Other than that, ride a few and see what is comfortable as far as shifters, brakes and weight. You can always adjust the seat height and handlebar neck to fit.