Fodor's Expert Review Observation Point Loop

A 2-mile round-trip route leaves Geyser Hill Loop boardwalk and becomes a trail shortly after the Firehole River; it circles a picturesque overview of Geyser Hill with Old Faithful Inn as a backdrop. You may also see Castle Geyser erupting. Even when 1,000-plus people are crowded on the boardwalk to watch Old Faithful, expect to find fewer than a dozen here. Easy–Moderate.