Just back from a whirlwind week and a half. Drove Boston to Lutsen, raced Lutsen (Purple corral!), then Lutsen to Leadville. Worked for 3-4 days getting used to the altitude, rode the whole course over two days as part of the camp (Except the top of the Goat Trail on Columbine because of snow). Drove home Sunday/Monday and back yesterday evening.
Getting out to ride the course and experience it was TREMENDOUSLY helpful.
Altitude was not an issue for me personally. I basically have to discount my FTP by 17-20% (more as I go up Columbine and maybe top of Powerline/Sugarloaf, but that didn’t seem to impact my endurance zone. I still felt like I could go all day if I kept it under wraps at my normal 180-200W. Even for me getting up to where we turned around on Columbine after the first section of Goat Trail (maybe 1.5 mi from Summit?) I was feeling fine if I paced myself and was still able to recover well after the hard section.
There are some parts of the course that are an absolute kick in the teeth. The bottom of powerline is obvious, would have been a 4-5 minute VO2 Max interval that would have crushed me without gaining much if any time, so walked that section after riding the switchback. The little soft sand turn then chunky section turning up onto the Boulevard climb was another one. At that point, I was like IS THIS REALLY NECESSARY 
4W/KG is going to be a HARD day to go sub 9. I still think it’s possible, but the hard part for me is I don’t know how I’m going to hold up pushing it for 9 hours, and I think everything will have to go right. Will have to see. I think what I’m finding is it’s absolutely critical for me to keep myself under my altitude adjusted threshold as much as possible, because I seem to recover well and I’m a diesel on the flats and the easy climbs. Going back up Pipeline, hagermann down to the bottom then up to carter aid and then again on the boulevard I was still feeling strong and passing people in those areas so I think those are the types of areas I’ll need to remind myself to keep the pace up a little and not noodle along. (I’m 177# and 315-320 ftp @ sea level on my MTB).
Sugarloaf and the top 3/4 of Powerline were MUCH chunkier and rocky than expected. I think I got a video of the entire Powerline Descent, but have to check the GoPro.
This time, I wasn’t fully recovered from Lutsen, and didn’t have as long to acclimate. When I’m back in August I’ll have 12-13 days at altitude and a full taper. But have to remind myself that I split the course into two days this time. A 4 hour and 5 hour day aren’t the same as a 9 hour day even though I was fatigued going into day 2.
Managed to “tweak” my shin at Lutsen as it flared up Monday. I think the Anterior Tibialis. Didn’t seem to impact me on the bike but am still dealing with swelling so taking some time off and icing the hell out of it
so that’s my only worry right now.
Under 6 weeks!