Where can I go Hog hunting in Colorado? I know we got em here. Can you hunt them on BLM?

I found one outfitter - http://www.coloradopighunting.com - Severson Outfitters, but they want a buttload of money to go hunt in a high fence.

Seeing as how they're a seriously destructive force with no permit requirements, I don't understand why they want $700 to hunt a hog

Thanks in advance!