If we start from B12 and then take 52 st. up to McDowell, the "McDowell" run and then run north to Indian School AKA 64th Street and hang a Right to 68th St. This should be 8.34 miles. If you keep following the canal right, you will hit Camelback and Scottsdale rd. which will be 10.82. I think 8.34 sounds better.
Here is a direct link to the canal calculator. http://www.solesportsrunning.com/canal-mileage.htm
