I'm like you, I judge distance traveled by how long I have been on the trail. Does not matter too much if on a flat trail or going up Forester Pass. Although I slowed to a little over a mile an hour with lunch, going from Vidette Meadow Jct. Judging too if food has rehydrated is the next best reason. If no watch, get up when I want, eat when hungry, go to bed when too dark.:)
Duane