Lassen National Park is located a few hours north of Sacramento. The park contains the southern-most volcano in the Cascade Range which is Lassen Peak. Throughout the park you will find still active mud pots and other types of activity. I stopped in the park in late 2009 while on a road trip from Sacramento to Denver with a friend. Even in the short time we stopped at the park it was an interesting site to see in the fall and is on my list of places to visit again.