proud to present you with the *official* id...
drumroll...
you have a western rattlesnake, it is not a diamondback (note the striped, not diamonds all the way down) it is not a prairie ( once again note the patterns)
here are all pit vipers (such as rattlers) found in the us
http://enature.com/fieldguides/view_default.asp?curGroupID=7&source=&parkid=&fromWhere=&searchText=&allSpecies=&shapeID=1060&lshapeID=0&curAbbr=&lgFromWhere=&curPageNum=1&lastView=default&lastGroup=7&lastRegion=&lastFilter=4&lastShapeName=&trackType=&curRegionID=&size=&habitat=&fruit=&color=&sortBy=family&viewType=default&curFamilyID=625®ionSelect=All+regions®ionZIP=
