The formation of the Alabama Hills is complex and fascinating. Meet volunteer Nancy Hadlock at the Eastern Sierra Visitor Center to learn more. ADA friendly. Things to Know About Ranger Programs -All programs are free of charge. -Programs are outside and are subject to cancellation without warning. -Children must be accompanied by an adult on all programs. -Wear sturdy walking shoes, dress for changing weather. Bring a hat, water, snacks, sunscreen, and your curiosity.