It's early spring in eastern Washington. That means the weather can throw snow and freezing rain at you one day, and offer sunny, almost balmy conditions the next day. Either way, you can catch trout if you take the right flies and the right attitude.
Look for increasing blue-winged olive hatches as the month progresses. Midges are also hatching, so be prepared with sparsely-dressed imitations. Carry size 20-22 olive Sparkle Duns, Parachute Adams, CDC Baetis, or Parachute Baetis for the blue-wings; tie them to a 6X tippet.
Subsurface, go with a black Hares Ear, Brassie, olive Scud, or Blood Midge. When hatches are non-existent, try a San Juan Worm, Egg Sucking Leech, Bunny Leech, or Woolly Bugger.
By late-March, you might find a few Callibaetis mayflies, although their season really begins in April. If they're present, match the duns with gray Sparkle Duns, Callibaetis Cripples, or Parachute Adams. Underneath, Flashback Pheasant Tail nymphs and Hares Ear nymphs draw strikes.
A white or olive Marabou Leech can also be productive at Rocky Ford.
Some of the angling pressure may be reduced on weekends now that some eastside lakes are opening up.
For more on March tactics and flies, see the Rivers in General forecast