Brent, if you're fishing the Sturgeon, Pigeon, and Black, you're within striking distance of the Maple. Look on the map at the boundary between Emmet and Cheboygan Counties, west of Douglas and Burt Lakes. The East Branch of the Maple holds trout early in the year but warms up too much by summer because it is fed by surface waters of Douglas Lake, but the West Branch is spring-fed from a swamp and is nice and cold year-round with a good brookie population (plus browns of course). The main stem below Lake Kathleen is good for larger browns, some nice brookies, and a few rainbows (including some bigger guys) - this is where I have done most of my fishing there. BTW, the University of Michigan Biological Station on Douglas Lake is my old stomping grounds from my botany undergrad/entomology grad school days, and the mainstem of the Maple is where I first threw flies at trout some 25 years ago, so it has great memories and emotional attachment for me.
Hatches are: Light Hendricksons/Red Quills in May, mostly in the afternoon; Light Cahills in June and July (dusk, amongst the Hex too); HEAVY Hex hatches around 4th of July (1-2 weeks before and after - go to Hoppie's Bar on Burt Lake and when they show up there, it's about a week later that they'll be hatching on the Maple); then not much for the rest of summer, time to get out those searching patterns and attractors like the Wulff patterns I mentioned earlier. There's some caddis activity as well but the Hendricksons, Light Cahills, and Hex are the big ones and they bring fish up to the surface pretty darned well - I've had them feed within 6 feet of me and felt them run into my leg after dark out there...
Last summer I was there in late August - not usually a productive time for me on that river, yet I managed to raise three fish and bring two to net on a #10 Royal Wulff. At least one of these fish was rising, to what I have no idea...
Best of luck!!! The Sturgeon, Pigeon, and Black are as good as any trout streams anywhere and the Maple is not far behind. My other favorite, as mentioned earlier, is the Rifle - plenty of advice for you on that one if you ever get there...
Jonathon
No matter how big the one you just caught is, there's always a bigger one out there somewhere...