Did it last weekend, 1200ft increase in elevation. Pack a sandwich to eat or grab one on the go. I hike often and hit the gym 4+ days a week so I might be moving faster than average. My lunch stop is usually 10-15 min.

Either way, if you start the hike before 9am in the North Bay you'll beat the traffic rush out of the city. You could spend an extra couple hours if you wanted. As long as you head back before 2pm you'll beat the re-entry rush into the city.