always up for a challenge, ive googled owls & found the following site that was helpful
http://www.owlpages.com/owls.php?location=USA
by the looks of the picture you took & the ones on the site, im guess its one of these three - the whiskered screech owl, the spotted owl, or the northern saw-whet owl... but thats just a guess. im definitely not an owl expert!