Highest is 25'.........I like 18' to 20' the best. At 20' and over the angles just to bad. I used to hunt alot at 10' to 14'.......and just got busted to often (probably 1 out of 3 times). Since moving to 18' to 22' the past to seasons......I've only been busted once, and that was adeer approaching from behind that I didn't see. I don't use any 'scent blocker stuff', I just keep my clothes clean and sweat free. The last 2 seasons I've had probably 45 to 50 shot opportunities(inside 20 yards).

Good Luck!