I attempted to hike to The Window near the Rio Grande Pyramid. I departed from 30 Mile Campground and headed up the Weminuche Creek Trail. I then branched off on the Rincon La-Vaca Trail and headed up towards The Window. At 8.33 miles, I decided to camp by a small pond because I was exhausted and feeling the effects of altitude sickness. I had intended to camp at the 9.62 mile point, but I was bonking and had nothing left in the tank. My backpack was far too heavy. I tried to rest and sleep it off, but the next morning I still felt "off" so I did the responsible thing and get off the mountain. Time to regroup and try again after I am in better shape.