The Middle Provo River is famous for its Winter midge hatches. They usually hatch at around noon which is perfect because that’s also the warmest part of the day. The Winter flies start off pretty small (size 26-30). You’ll see these tiny bugs through December and January. As we start to get into February and March they get much bigger with sizes being in the 16-18 range. They say there are about 4000 trout per mile in the Provo River and during some of these hatches you’ll know that to be absolutely true. During the peak of these hatches the Provo River will look like it’s boiling with all of the rising trout. Nymphing before during and after these hatches can be amazing.
The best flies for this time of year will imitate these little bugs. Provo River trout tend to be very hatch specific so you should use flies that are a close visual representation of the actual insect. You’ll want to make sure to have all 3 stages of this bugs life covered. First you’ll want a good larvae imitation. Standard zebra and thread midge patterns will work best. Match the size of the bug that you’re trying to imitate. The bugs are generally grey to black but mix it up with some blue, red or purple patterns too. Sometimes it’s just a matter of making your fly stand out from the others. Next you’ll want some emerging midge patterns that have a little wing sticking out like a bug that is just coming out of it’s shuck. A lot of the time they like a flashy wing like Sparkle Organza or Flashabou. Fish these on the bottom, mid column or in tandem with a dry fly. Some good dry fly patterns for these hatches are the Mother Shucker, Orange Asher and Griffiths Knats.
The Lower Provo River report for the Winter months are about the same as the Middle Provo with a few exceptions. The midge hatches will start off a little slower here until February. Look for them during the warmest part of the day, generally 11-2. You’ll see some good hatches but not quite as consistent as the Middle until late Winter, February-April. Once they do get going you will see sheets of midges on the water and trout eating mouthfuls of bugs instead of just one at a time. This is a good time to use big cluster midge patterns.
Nymphing on the Lower Provo should be pretty good. Look to match the hatch with midges from size 22-28. The Lower is also a sowbug factory and they will eat these all year long especially in the colder months when there aren’t as many options around. Use smaller sowbugs in various shades of grey from December-January size 24-20. As winter gets closer to Spring you can start using bigger sizes 20-16. The brown trout will continue to spawn through December so egg patterns should continue to produce fish into January. I like to use small orange and peach colored glow bugs in sizes 16-20. Be mindful this time of year and be aware of spawning beds.Use caution while wading to not walk through the redds.
As a side note. I was featured on KSL Outdoors. Check it out.