I rode the Headlands one more time this weekend to make sure I got in enough saddle time, doing sustained climbing efforts before Leadville. I did three loops and climbed over 6,000' in 50 miles in under four hours. At this rate I'll have done the equivalent of the Leadville 100 course, minus the start elevation, which is a staggering 10,200' above sea level.
On my last loop up to the top my scratchy, squeaky drivetrain turned into a nasty metal on metal grinding sound. I just rode the crap out of my bottom bracket today, seized bearings and all. Better to replace it now than 50 miles into Leadville. While I'm at it a new rear tire, rim tape and tubeless valves. Cutting it close.