Canyoneering History
From CanyonWiki
[edit] Zion Black book
[edit] Historical Topos
Fort Lewis College (Center for SW Studies) has been putting historical 1:250k topo maps on the web. They have maps covering most of the 4 corners region, including all of southern Utah. The Utah maps are all from circa 1880's though a few were updated in the 1900's.

