Tiny Baetis mayflies are perhaps the most commonly encountered and imitated by anglers on all American trout streams due to their great abundance, widespread distribution, and trout-friendly emergence habits.
Time of year : July through August
Preferred waters: Slower than other mountain Epeorus species
Altitude: 5,000 to 6,000 feet
Water temperature: Warmer than other Western Epeorus species
Time of day: Early morning or late afternoon/evening
Current speed: Fast