The fourth annual Eddy Flower Vertical Challenge is officially underway. The whitewater boating competition has a simple concept: teams of boaters paddle as many vertical feet on any combination of rivers and creeks as they can in 32 days. The Eastern division competition kicked off March 15 at sunrise and ends at sunset on June 15. The challenge also raises funds for First Descents, a non-profit benefiting young adults with cancer. In 2009, the competition raised nearly $35,000 for the organization. 182 competitors from 13 states battled it out, paddling a combined 1,182,276 vertical feet, which equals climbing from the sea to the summit of Everest 40 times. Find out more at eddyflower.com.