We moved camps again today. From Nido to Colera which is at 5980m. Just the ~1000ft increase in altitude made a big difference. Every little task leaves me out of breath. For the first time the climbing part was physically challenging. I have a slight headache, and we are told to hydrate, hydrate, hydrate.
Camp 3 is filled with strange rock formations. It finally dawned on me when eating dinner what it reminded me of: old strange planet sets from Star Trek the Original Series.
Again an early bed time but tomorrow morning we start our summit! It will easily be the longest and hardest day of the expedition.