Mountain bikers pushing bikes up hill

hill mountain bike pushing extreme terrain transportation bicycle landscape mountain leisure sport challenge cycling fun recreational pursuit rucksack rock bike casual mountain biking young men mid adult men only men struggle dirt track healthy lifestyle vertical outdoors day fitness active rear view elevated view full length 30 34 years 35 39 years four people casual clothing 25 29 years male caucasian ethnicity cycle scenery view amusement youngsters males people men daytime activeness activity