I did a 50 mile trip and it said empty by the time I got back to the staging area. We checked it, and It looked like I had 1.5 to 2 gallons left. Lot of hard riding, Quick stops, fast take offs, climbing and river fording. So for 5 gallons on easy open trail, you should be able to get 90 to 100 miles if kind of steady and fast. But if your digging and putting it to it, I'd guess a bit over 50 per tank.