Northern pike and yellow perch are the most likely to be active at Tally Lake right now, because their listed reference temperature ranges (55–70°F and 50–68°F) are the closest to the current surface estimate of 72°F. The coldwater trout species (lake, rainbow, cutthroat) are well outside their ranges (45–65°F or lower) and almost certainly have moved to deeper, cooler water—though no depth or thermocline data exists to confirm that.

Why this inference holds:

The lake-page modeled surface-water estimate is 72°F (updated 08:00 MDT today). This is 5°F above the historical median (~66.9°F) and above the typical warm-season range (66.5–70.1°F).
Northern pike: 72°F is only 2°F above their upper limit of 70°F. They are warmwater-adapted and can tolerate brief excursions above that range, especially if they have access to slightly cooler pockets (e.g., shaded shoreline, deeper edges).
All trout species (lake, rainbow, cutthroat) are 7–12°F above their upper limits. Their reference ranges max out at 60–65°F. At 72°F surface, they are under thermal stress unless they are located in a deep, stratified zone—which is unverified.

What this does not mean:

Temperature alone does not prove feeding, location, depth, or activity. These are reasoned hypotheses based on species biology and the measured surface temperature. No recent catch data or on-water observations are available to confirm current behavior.
If you target pike or perch, start in a legally accessible area where you can verify manageable wind (currently 3 mph) and look for shade or a depth transition (e.g., drop-off, creek channel) if you can confirm it with electronics. The calm conditions favor longer casts with quieter presentations—spoons, spinners, or small jigs for perch; swimbaits or spoons for pike.

Tally Lake Fishing Report