Wildflower Hike and book signing with Mary Priestley,March 11-12 at 2 p.m. Meet at Twin Falls Overlook for a book signing and guided 1.5-mile hike on the Downstream Trail.Priestley is the author of “William’s Wildflowers,” “Voices of the Wilderness,” and “What if Trees Could Walk?” Blue Hole Trail Hike with Mary Priestley,March 12 at 10:30 a.m.Meet at the Blue Hole Trailhead. This is a steep, half-mile, one-way trail that winds down and along beautiful waterfalls and seeps, ending at the Blue Hole.