Rocky Mountain National Park: The Complete Hiking Guide

This is the definitive guide to the hiking trails of Rocky Mountain National Park. Literally every single one is included in this book. It’s one of the most complete hiking guides available for any national park. This is a highly recommended purchase for anyone who plans to hike here.
Purchase at Amazon • Amazon UKHiking Circuits in Rocky Mountain National Park

This is a somewhat unique and very useful hiking guide for Rocky Mountain National Park. It features hiking circuits, mostly loop hikes. The park has many interconnecting trails, and this book helps you get the most for your mile, without doubling back. We use this book and recommend it.
Purchase at Amazon • Amazon UKRocky Mountain National Park: The First 100 Years

This is an outstanding hardcover book covering Rocky Mountain National Park. This is a classic coffee table book, full of wonderful photography along with the story of the park.
Purchase at Amazon • Amazon UK