If you're looking for a "do anything, go anywhere" mountain bike a second hand Trail or Enduro bike is the ideal choice. These are highly capable mountain bikes that climb and descend super well, perfect for short blast around your local trails hitting jumps and drops or for all day epic adventures. They differ slightly as Trail bikes have slightly less travel, a steeper head tube angle and shorter wheel base meaning they're more efficient up the climbs bit less forgiving at speed through rough terrain. With more travel, slacker head tube angle and longer wheelbase Enduro bikes are a bit more forgiving than Trail bikes, but the trade off they're a little heavier and less efficient when riding back up the hills.