Source identified1
“It was a ride of nearly thirty miles, and of many hours, one of the most splendid I ever took.”
Bird remembers the long ride as splendid because distance, physical exertion and the Rocky Mountain landscape combine into an unusually vivid firsthand travel experience.
Source note: A Lady’s Life in the Rocky Mountains, Letter IX, Project Gutenberg #755. Bird is describing a nearly thirty-mile cattle-drive ride in Colorado and immediately recounts difficult terrain, streams, lakes and mountain views; this is historical travel narrative, not present-day route or safety guidance.