Weekly Template for Endurance Workouts

Since I'm training to run a half-marathon on October 30th, and I want to eventually run the Pike's Peak Marathon, I've created this weekly template for workouts somewhat based on CrossFit Endurance's schedule:

M	T	W	Th	F	Sat	Sun
S	X	X		S	X
E		E	E	E		E

where S = Strength workout, E = Endurance Workout, and X = CrossFit Workout