To continue up the canyon we crossed the wash a couple more times. It was becoming apparent that the trail was washed out in some sections. We knew that there had been a pair of hikers in and out the day before and we could see their tracks. Theirs were the freshest tracks, and we followed them in many places where the rock cairns weren't obvious. The tracks always ended at the edge of the wash. The footprints were also dappled from a light rain that had fallen since they were laid down.
That light rain isn't what was responsible for the flood damage to the trail. This canyon had flash flooded yesterday afternoon sometime after the last hikers exited.