It's slowed down. Fish are going a bit deep, if fishing from shore, I'd throw a damsel early in the morning. If in a float tube, you'll do better, and start using an intermediate or sink tip. Finger crawl your nymphs. Buggers in olive, black and white. Red zebra midges, Blood midges, small Maholo's, hares' ear, damsels, sheep creek specials.
(PRO HINT: Strip to the tune of the theme to Bonanza, to vary the movement of the streamers)