Man riding mountain bike in woods

active adventure bicycle bike riding biker biking bridge caucasian challenge color image concentration crossing day determination energy environment exercise extreme sports fitness freedom full length health helmet hobby journey leisure activity lifestyle man mid adult motion mountain bike mountain biking nature one person outdoors people photography recreation remote riding safety sport sports tilt vertical weekend activities woods 30's action adventuresome bicycling bike challenging color colour concentrating cycle daytime entertainment exercising forest full body hardy hat hobbies intersecting leisure liberty lifestyles male movement natural one outside pastime person power resolution ride rider security tilting traveling travelling tree trip western european