Reworking IMAZ last three weekends of training - Need advice

I might suggest separating the Long Run and the Long Ride in your schedule. (Since it seems like 24 hours is not enough time to recover)

I did most all of my Long Runs Mid-Week and although it is a pain, it's worth it to be able to hit the 100 miler with fresh legs.

The primary goal being to get in solid workouts and provide ample time to recover before attempting another hard/long workout.

FWIW: I also did one weekend where I did a Long Ride on Saturday and a Long Run on Sunday, but I was/am to the point with my training where a 20 mile run or a 100 mile ride did not have a significant impact on my training the following day.

Good luck and maybe see you in Arizona. (I am volunteering and Signing up for 2009)

Try doing long run early in the morning Wed or Thursday and go into work late might be an option. Or figure out what can work in your work/family life.

I separated my long runs and long rides by 3 days if possible. Running fatigues me the most of all my training.

Just an observation from your post seems like cycling is worrying you most so perhaps the next three weeks it will be more important to get the long bikes in. Coming off the bike as fresh as possible  is key to having a good mary in an IM.

From what I remember this was the tough time for me the last build before IM taper.

I think riding your bike is much more important that running 20 miles.  Matter of fact - you have an 18 miler - that was your LONG run for IMAZ, great, good to get that out of the way, in the next three weeks keep your long run right at 90 minutes to 2 hours.   The next three weeks ride your bike, ride your bike, ride your bike.  As someone suggested, move you long run to Wed. - get up one hour early and bingo you can get a 12-13 miler in and get recovered for your 100mile ride this Saturday.

Trust me on the running, your IM marathon will not be anything like a stand alone marathon.  You need to be able to get off the bike fresh enough to run.

What Mike said.  Use this last push to focus on bike.  The 18 miler is sufficient (I am no coach, so take it with a grain of salt)

I was able recently to separate the long rides and runs, and the quality of the runs got much higher.  If you can, it's a good thing

Don't sneak another long run, you are good, period.   Since you have 3 runs over 2 hours you are golden.  Better to bike 100 then run another 18 miler.

On your bike, I would aim for 3 - 100 milers if you can.   At least two, maybe go 100 this Sat, next weekend do a long brick like 60bike/6run (do this one at IM pace), then the next weekend do another 100, then 2 weeks out 50bike/6run (at IM pace).