Just cast the fly into the rings left by a rising fish and prepare yourself. Flyfisher also reports good fishing during summer months with unweighted streamers fished on the swing. Spruce flies or brown trout fry imitations cast into larger runs work best with this approach. You'll often find rising fish under the brush at the river's bank. Brown trout in both sections of the Provo will spawn in October and November.
Streamer fishing is often best in the early mornings before sunlight reaches the river.
If you feel strikes to a streamer but are unable to hook up, try streamers with stinger hooks, or try articulated leeches with the hook placed close to the rear of the fly. Many anglers fish glo-bugs or other egg imitations during the spawn. While effective, it is also disruptive to fish more focused on reproduction than eating. You can limit your impact on spawning fish and ultimately the health of the river by avoiding spawning beds or simply staying away from the river altogether. Salt Lake City International is a stop for most major airlines.