Thanks for all the info.

The Paleo Lands Institute cycling tours concentrate on the lands around the John Day River Basin so it is northeast of the area you mention, more around
http://www.blm.gov/or/resources/recr...nday/index.php
http://en.wikipedia.org/wiki/John_Da...ional_Monument

BTW, it's now mostly horses, alpacas, llamas and goats on those backroad between Bend and Terrebonne. The cows are the minority.

More on the Crooked River Caldera
http://gsa.confex.com/gsa/2007CD/fin...act_120471.htm