Tri-Valley Trailblazers are sponsoring a free presentation, “Pine Nut Wild Horse Advocates,” on Wednesday, Oct, 9, 7 p.m., at the Livermore Library. TVT focuses on all matters that pertain to the use, enjoyment, care of or improvement of horses, safety and horsemanship, and the preservation of and enhancement of trails. www.facebook.com/TVTrailblazers, and www.facebook.com/Wildhorseadvocates.