DCNR Lowers Age for Online Safety Classes. In an effort to provide better customer service to Pennsylvania’s snowmobile community, DCNR’s Bureau of Forestry lowered the minimum age for ONLINE snowmobile safety training from 16 to 10. The memo was emailed to the forest districts yesterday. Also, you’ll see the change has already been made on the website, so please spread the word – https://www.snowmobile-ed.com/pennsylvania.