If you are a 50 mile rider, you don’t need to wait until noon to start your 50 miles. You can start with the century riders headed south past Buffalo Eddy.
The century just combines these two routes. However, you get to choose which 50 mile leg you prefer.
Even more cool is that you can turn that morning 50 into a 75 by riding out to the 25 mile turn-around at Nisqually John.
Of course, out and back routes allow you to turn around whenever you like. So this is definitely a ride with more options for riders.