Man mountain biking on mountain track

mountain mountain bike mountain biking nature transportation bicycle landscape hill leisure sport competition motion challenge cycling speed solitude fun recreational pursuit extreme terrain healthy lifestyle riding dirt track horizon over land bike one mid adult man only cycling helmet sunglasses vertical outdoors day fitness active loneliness 35 39 years one person full length male caucasian ethnicity alone approach safety helmet mountain range ridge cycle scenery view rivalry solitary solitariness amusement man daytime activeness activity lonely one person only