Humboldt County is home to many of these specific things, extreme physical examples of which include the (*) Hyperion, the Lost Monarch, the Del Norte Titan, and the General Sherman.
An area named for these things is home to the four sources of the Kaweah River and to Moro Rock. Many of these things collapsed due to the 1955 "Christmas Flood" causing overruns in Bull Creek and the Eel River. Members of the Boone and Crockett Club, including John C. Merriam and racist eugenicist Madison Grant, founded a "League" dedicated to "saving" these things. Along with the explorer Jedediah Smith, these things name a state park located about nine miles east of Crescent City. Humboldt County is home to many of these specific things, extreme physical examples of which include the (*) Hyperion, the Lost Monarch, the Del Norte Titan, and the General Sherman. For 10 points, identify these huge trees that name a number of state and national parks in California.
An area named for these things is home to the four sources of the Kaweah River and to Moro Rock.
giant redwoods [or Sequoia sempervirens; or Sequoiadendron giganteum; or coast(al)/California/Sierra redwoods; or giant sequoias; do not accept Metasequoia glyptostroboides; prompt on more general answers like "trees"]