Lori Oliver-Tierney will be giving a presentation at the Mariposa Museum on Saturday, October 19 at 2:00 p.m. Lori is a well-known local author who wrote the book “Trudge – A Midlife Crisis on the John Muir Trail”. Lori will be talking about the ups and downs of her 211 mile journey as a 50 year old woman hiking alone and the people she met along the way. Free Admission. The museum is located at 5119 Jessie Street in Mariposa. Please call (209) 966-2924 for more information.