Grand Canyon Information Resources
Back Country Hiking Brochure
https://www.nps.gov/grca/planyourvisit/upload/intro-bc-hike.pdf
South Rim to North Rim Hiking Blog
https://www.nationalparks.org/connect/blog/grand-canyon-rim-rim-hike
National Park/Grand Canyon Info
https://www.nationalparks.org/explore-parks/grand-canyon-national-park