MP 577.27 to MP 592.82 for 15.75 miles today. With approximately 2000 gain and 2600 lost. It was a cool and windy night. Filtered water 6 miles from camp with the next water 19 miles ahead. Chatted with Nightengale and Engine, and met Laura from Alaska and Montana. Jerry lost 1.5 liters from his water bladder when hike pack rested on his mouthpiece! This left us with only 4 liters to get thru the next 9 miles and a dry camp.This scared me because Jerry does not do well with dehydration. Jerry also had a bad fall on the trail due to a small stump ( 2” tall and 1/4” diameter) that was concealed by a small plant. Kathy was mentally struggling with our lack of miles. Our goal of 20 milers per day was still not achieved.