The Photographer's Ephemeris (TPE) application provides detailed information with the exact position of the sun and moon as viewed from a particular location on a on a given date and time. TPE also provides shadow length, and whether or not a subject will be in shade at a given time. Click on the next icon to open The Photographer's Ephemeris centered on Old Faithful:
TPE is also available for iOS and Android phones and tablets. See http://photoephemeris.com/ for more details. Highly recommended!
TPE is published by Crookneck Consulting LLC and the web application is free to use.
Sunrise/Sunset times are given at Old Faithful and reflect DST.