A very old list (2004 was like centuries ago!) from National Geographic Adventure (which exists, near as I can tell, to stick it to Outside) profiles the top 100 adventure books. A few I liked:

7. Desert Solitaire, by Edward Abbey (1968) Abbey is our very own desert father, a hermit loading up on silence and austerity and the radical beauty of empty places. Early on he spent summers working as a ranger at Utah’s Arches National Monument, and those summers were the source for this book of reverence for the wild—and outrage over its destruction. But really his whole life was an adventure and a protest against all the masks of progress. He wanted to recapture life on the outside—bare-boned, contemptuous of what we call civilization—and to do it without flinching. He helped ignite the environmental movement, teaching his followers to save the world by leaving it absolutely alone.
Simon and Schuster, 1990.

Have to read that one sometime. His Monkey Wrench Gang was great fun.

13. Roughing It, by Mark Twain (1872) Twain lit out for the territory when the Civil War started and knocked around the West for six years. Roughing It is the record of that time, a great comic bonanza, hilarious when it isn’t simply funny, full of the most outrageous characters and events. It is not an adventure book, it is an anti-adventure book, but no less indispensable.
Penguin, 2000.

More great reads, which, come to think of it, would take time away from your essential blog-reading responsibilities. When will I ever learn?