Lassen Volcanic National Park, about 50 miles east of Redding, is California's secret Yellowstone. It gets just one tourist for every 11 who reach that other Yellowstone. It's the most geothermally active destination in the state, its slopes and meadows dotted with boiling creeks, steaming lakes and bubbling mud pots. Bumpass Hell, full of steam-belching scenery, is one of its most popular hikes.
In honor of this year's National Park Service centennial, the Travel section is posting 100 park travel ideas and tips based on trips staff travel writer Christopher Reynolds has taken, along with photo-op advice from Times photographer Mark Boster. We'll post one per day through Dec. 31.
Follow Reynolds on Twitter: @MrCSReynolds