Check out Steve Hill's (a rider from Berkley, CA)
write up about his ride around Crater Lake in 2005.
Steve asks the question, "Is this the best bike ride in North America?" I think it is.

  View his opinion!
Crater Lake

The deepest lake in the United States and the 7th deepest in the world is located in the northern part of Klamath County and was chosen as the site of the century ride because few places on earth command overwhelming awe from observers as Crater Lake does. Even in a region of volcanic wonders, Crater Lake can only be described in superlatives. Stories of the deep blue lake can never prepare visitors for their first breathtaking look from the brink of this 6 mile wide caldera which was created by the eruption and collapse of Mt. Mazama almost 7,000 years ago. Even seasoned travelers gasp at the twenty-mile circle of cliffs, tinted in subtle shades and fringed with hemlock, fir, and pine: all this in a lake of indescribable blue. For more information about Crater Lake , go to www.nps.gov/crla.