I measured out the entire trail from the CPS lot, to the south end of the bridge, back across the bridge and into the woods to the CS, then back. This is only my guess on the route BG took, and the measurements are estimates. And it's assuming the witness statements are accurate to BG.
This article says the average time to hike a mile is around 30 min., give or take for terrain (ie. - bridge).
Determine How Long to Hike a Mile
IMO, based on the measurements, the timeline works out uncomfortably well if the murders happened quickly.
Red squares are pre-murders, green squares are post-murders.