Welcome to Bigwalls.net, a repository of all things bigwall climbing.  

For the old Bigwalls.net (around since mid 1990s), which is old but still has some useful info, click here (opens in new window).  

To contact John Middendorf, email is best.

Click here for Mechanical Advantage, Volume 1 (450MB PDF file)

Note: Bigwalls.com now goes to Ryan's big wall how to video pages.