Bowknot Bend is one of the many unique geological features. The Green River was home to an ancient civilization known today as the Anasazi. You can see evidence of the Anasazi people including rock structures and petroglyphs. There are numerous trails along the river, or you can hike up to the bluffs and ridges or up side canyons. At Spanish Bottom a steep but easy trail goes up to the Doll's House, named for its fascinating rock formations.
Spring is excellent for canoeing the Green River.
Although April can be chilly, the river will be less crowded. May and June generally have the highest water, and peak in popularity. By June, the days can be beastly hot. Autumn is reportedly good, but it can be rainy and cold. This is a completely remote canoeing experience, so be sure to be prepared for extreme conditions of weather.