Tatum is not a bad place to start out on the mountain bike... A lot of open fields and some single track, some hills but nothing too difficult... Hartshorne can be a bit daunting if just starting out... There is a race each year at tatum called woods hollow, google that and you may find the course, it goes for about 4 1/2 miles or so... Do it front and back and it will be a good beginners ride... Nothing too technical either...