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.
This one pretty clearly keys to Kogotus, but it also looks fairly different from specimens I caught in the same creek about a month later in the year. With only one species of the genus known in Washington, I'm not sure about the answer to this ID.
GONZO on Aug 11, 2009August 11th, 2009, 5:14 pm EDT
The short answer would be no, but legs that are some shade of brown or tan are pretty common. As Casey points out, some have blackish legs, and others can have rust, orange, yellow, gray, or whitish legs. Many have plain-colored legs, but some have distinctly banded legs.