I just started my training for the Boston Marathon in earnest this week. I'm doing an 18 week plan modeled after one of Pete Pfitzinger's plans that will have me peaking just above 70 miles.
Tuesday - 1 mile warm up then 5 x .5 mile repeats w/ .5 mile recovery jogs - 44:41 - (7:27)
Wednesday - Medium Long-Run - 11 miles - 1:27:15 - (7:56) My plan was to run this at about 10% above my marathon pace which would is 7:30 +/- I was spot on until I kicked it in to finish strong for the eleventh mile and ran that in 6:59 which put my average pace a little lower. I pretty happy with that and have an easier 5 mile recovery run scheduled for later today.
I have just started training for Boston this week, so it's a 17 week schedule for me. I'm using Pfitzinger's 18 week plan for more than 70 miles per week (skipping the first week of the plan). Other than skipping the first week, I'm going to try to stick pretty close to the plan. One of the tougher parts of it is the mid-week medium long runs. I'll have to get up extra early to fit them in before work. But I think they really help with endurance, so they're worth it. Fortunately, I'm off from work this week, so it's a good week to get started.