Still waiting for their shot at the top!

The crew took another rest day yesterday. The move up to high camp can really take a lot out of you and often requires climbers to take a day r two to let their reserves build back up. Today looks like it could be a possible summit day, so we will keep you posted if they make an attempt.

Thanks to everyone who posted comments on the previous dispatches. We will make a point of asking the guides for weather and temperature information, as that will give you, the readers, a better sense of what your friends and family are experiencing. From experience, I'll tell you that when the sun is out on Denali, it is often quite a bit warmer than you might expect. Even at high camp, 17,200 feet above the sea, you can walk around in a light fleece if the sun is out and the wind isn't blowing.

One reader asked for information on oxygen saturation levels for the climbers. We carry small pulse oximeters with us as a diagnostic tool, in the event that someone is not feeling well. This is one piece of information that can help with the decision making process as to whether a climber should continue heading up, but it is only one piece of the high altitude puzzle. Different guide services have different protocols about how to use the information provided by your 02 sat levels, so I'll just leave it at that.

Keep your fingers crossed that the high clouds that seem to be hovering over the summit in the TAT webcam are only in the foreground and not really parked on the summit.