Blue-Winged Olives in Montana: Watch the Water

Small bugs can take a little watching

Blue-Winged Olive is a familiar fishing name for small mayflies, often including Baetis. It is a useful name for a fly box, but it does not identify every insect drifting past the boat. Keep a little room for uncertainty when you are looking at something small in moving water.

Before casting, watch one piece of water for a few minutes. Look for insects, repeated rises and the lane a fish uses. A single splash gives you less to work with than several feeds in the same place. Give yourself time to see the pattern.

Find the lane before making the cast

Notice where the fish rises in relation to a seam, a patch of foam or a bank feature. Pick a cast you can manage without laying line across every current between you and the fish. A shorter controlled presentation may be easier to learn from than reaching across the river.

On a guided day, ask where the drift should begin and where the guide expects drag to start. Work through one cast together. If you miss the lane, try a small position change before deciding that the fish refused the pattern. Sometimes the fly never reached the fish in a useful way.

A cloudy day is a clue, not an appointment

A gray sky can make you hopeful, but it does not promise a hatch. Watch the actual insects and feeding activity. Check the wind and the forecast through the afternoon, and keep layers handy. Waiting for a particular insect is more comfortable when you are prepared for the weather.

Sheltered water can be worth a closer look when the main current is difficult to read. If you cannot find surface activity, be willing to fish underneath or change the plan. There are more ways to enjoy a Missouri River day than waiting all afternoon for one kind of rise.

Size, profile and a drift you can see

Start close to the size and profile of what you can observe. Bring a few options that ride differently rather than dozens of patterns you cannot tell apart on the water. Tell your guide if you are losing sight of the fly. A presentation you cannot follow makes it harder to know when drag begins.

Watch the leader and the nearby bubbles. Does the fly keep the same pace, or does it pull sideways as the line tightens? Adjust the angle or the amount of line on the water. Give that change a fair try before tying on something else.

If a fish keeps feeding but passes your fly, that is useful information. Recheck the lane, drift and visible insects. You may need another size or a lower-riding presentation, but you can make that choice with a reason. There is no prize for changing flies the fastest.

Keep Craig observations tied to the Missouri

For fishing around Craig below Holter Dam, the linked USGS station is the Missouri River near Wolf Creek. Read the current flow and recent graph, then compare the weather near the stretch you plan to fish. Neither is a hatch report. A story from last fall can help you prepare without telling you what will happen this afternoon.

Write down the date, approximate time and what you actually saw after the day. A short note about insects, rise forms and the drift that worked is enough. Next time, you will have an observation to compare instead of a memory that every cloudy day fished the same.

Current regulations and closures come first. Check the public sources before travel, and send GFM your dates if you want help planning a guided day. We can talk about the fishing you enjoy while keeping the final approach open to the water in front of us.