You do it for the passion.
Pros: variety, locations, co-workers
Cons: low pay, awful work-life balance
Working as Park Ranger is a job that is only for the passion. The pay is low, you work crazy hours, and are always on call. The payoff is no day is the same, you work in some of the prettiest places and you get to meet and work with some great people. You have the normal red-tape of working for the state, but there is some stability that comes in working for the government.