Originally Posted By OregonMouse
HPD, since those "organics" are still illegal under Federal law, it's not a good idea even to have them in your possession, much less using them, on Federal lands! The local sheriff may not care, but your friendly USFS or NPS ranger will definitely arrest you, and it doesn't matter if the federal land is in a state that has legalized those substances.

I know HPD has responded, but I thought I'd add that it goes beyond federal lands. It's important to those considering to know the laws of their state. While states have legalized personal pot use, some only allow it in private. In Washington, while private consumption is not against state law, public consumption is subject to a civil violation and fine. Just know your laws.