Always watch the weather. In 2004 snow 6 inches deep on the summit and drifts a foot deep. In 2005 hail started at about 11:00 AM hailed 6 inches deep, some runners did not get off the Mt. until evening. In 2008 extremely worse than bad blizzard conditions, wind chill of 0, unable to tell where we were except for the mile markers. If you or your family and friends are on the top and the weather starts to turn leave immediately. Plan to meet fellow runners at the brake check or bottom. Nice weather on top could mean 40 degrees with 20 mile an hour wind, that is cold when you have used all your food energy to get to tree line and you still have three miles to go, plan on 1 to 2 hours for the last three miles. The last two years have been perfect I didnít even put my wind breaker on. Believe for the best and be prepared.