The Sac River Trail Marathon takes you from Shasta Dam to the Sundial Bridge via single track trails. It is fast and scenic, with 800' net elevation loss, no hills of significance! 1 mile on the dam, 21 miles single track dirt, and the last 4 on a paved bike path. The 15K and 5K both start and finish at the Dam. All three races boast fantastic views of the three Shastas (mountain, lake, dam).
Local time: 3:17 AM
The marathon starts on the dam and finishes at the Sundial Bridge.
Check out the website for details and more pictures!