After some research later, we decided the to do it southward in 3 days 2 nights. We also recruited Darlene who do not have Monday off, but she would join us for one night, and headed out from Willard notch to York Pond road trailhead. The entire ridge from trailhead to trailhead is about 25.4 miles, total elevation gained is 5737 feet. We will break it down to:
Day 1:
South Pond Trailhead to Unkown Pond Tentsite: 8 miles
Elevation Gain: 2648'
Elevation Change: 2066'
Day 2:
Unknown Pond to Willard Notch: 7.5 miles
Elevation Gain: 1624'
Elevation Change: -456'
Day 3: Willard Notch to Starr King Trailhead: 9.7 miles
Elevation Gain: 1465'
Elevation Change: -1168'