||The 28th Annual Konocti Challenge Century is a beast!! With over 5500 feet of vertical climb with a couple 13%+ grades, your legs will be burning! Never fear though, there are 3 other rides to choose from - 40 mile, 65 mile and the 20 mile Fun Ride. The 65 and 100 mile routes both give you the opportunity to ride AROUND the largest natural lake in California breathing the cleanest air in the state. Ride through pastoral vineyards, towering pine trees, mountain roads, rural pastures, beautiful lake views - all on one ride! rnwww.konoctichallenge.com.