Run 1:30:00 
At Valley Forge. Like last time, half loop through woods, down to train tracks, NW to Fatlands, traverse, cross 422 bridge, in woods along train tracks and back to the parking area for last few minutes.
Used the Camelback that Dasha so kindly got me. It worked well - I didn't notice the weight and wasn't really thirsty when finishing, despite running at 3:00 with temperature near 90.
Undecided whether to race with it - though if I could anticipate a "race" like West Point Day 1 this year, I would be thrilled to run with it.