When we visited Kings Canyon, we also decided to explore the wonders underground at Boyden Cavern which is located in Kings Canyon, Sequoia National Monument.
From Sequoia National Park, we followed the road to Kings Canyon National Park. We went east of highway 180 to the bottom of the canyon where the road meets the Kings River. The parking lot is off the bridge.
Highway 180 and Kings River Canyon
Please click here http://california.today.com/2008/11/26/boyden-cavern-kings-canyon/ to read more and for more pictures of Boyden Cavern.