David Harris is a professor of engineering at Harvey Mudd College. He is the author or coauthor of seven hiking guidebooks and four engineering textbooks. David grew up rambling about the Desolation Wilderness as a toddler in his father's pack and later roamed the High Sierra as a Boy Scout. As a Sierra Club trip leader, he organized mountaineering trips throughout the Sierra Nevada. Since 1999, he has been exploring the mountains and deserts of Southern California. He lives with his three children in Upland, California, and delights in sharing his love of the outdoors with them.

Jerry Schad (1949-2011) was Southern California's leading outdoors writer. His 16 guidebooks, along with his "Roam-O-Rama" column in the San Diego Reader, helped thousands of hikers discover the region's diverse wild places. Jerry ran or hiked many thousands of miles of distinct trails throughout California, in the Southwest, and in Mexico. He was a sub-24-hour finisher of Northern California's 100-mile Western States Endurance Run and served in a leadership capacity for outdoor excursions around the world. He taught astronomy and physical science at San Diego Mesa College and chaired its physical sciences department from 1999 until 2011. His sudden, untimely death from kidney cancer shocked and saddened the hiking community.