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Fishing Report Archives


September 9, 2017

Streamflow - 244 CFS Water Temperature - 55-59°F

      Apologies for the lack of posts recently; we have been forced to make some adjustments due to the fires, smoke, and overall lack of traffic up Rock Creek.  I am personally back up in Kalispell for the fall and winter season and have been unable to tend to Merc business as much as I normally have.  Still, I am relaying the info that Carolyn and Daniel are giving me, and the both of them are running the fly shop splendidly in my absence.  We have new hours in the store for the fall/winter season:

Monday and Wednesday 9AM - 2PM
Friday and Saturday 9AM - 5PM

     As for hatches, the Mahogany Dun and the October Caddis have both emerged and are catching fish, but a lot of anglers are still sticking to the Purple Haze as their main dry fly pattern.  Nymphs are a better option in the middle of the day, when the fish aren't as prone to rising. Try an Orange Serendipity or a Jumpin' Jack Flash for some good production.  If streamers are your thing, Wonderbuggers and big Articulated streamers are getting better each day as the water temps drop.

     This has been one of the most difficult seasons we have ever faced at the Mercantile, and the fishing and tourism industries in Montana have suffered greatly from the smoke and fires.  Nevertheless, we are perservering and appreciate the patronage of those who visit our store, and we will be here throughout the fall and winter and hopefully back as strong as ever for the next fishing season as well.  Thanks also to the firefighters who have been doing an exemplary job with this unprecedented fire season in Montana.  Tight lines, anglers! 


Questions or comments?  Please call or e-mail us:
(406) 825-6440 / rcmerc@blackfoot.net

August 23, 2017

Streamflow - 255 CFS Water Temperature - 56-63°F

 This has been a very slow summer up Rock Creek.  Although the fishing has been steady and productive, the smoke that comes and goes has been keeping many anglers away.  This is especially true on the weekdays, so if you have an opportunity to play hookie from work, this is the place to fish.

     Purple haze attractors have been the top dry fly, but you can also fish caddis and PMD patterns or crippled emergers if you find the fish hesitant to come all the way to the surface.  Nymphing has been catching more fish, and again, use the color purpleStreamers are also catching some nice sized trout, but stick to them mostly in the mornings and evenings.  The fishing will remain good into September and October, so stop in on your way up and get some great patterns for Rock Creek!

Questions or comments?  Please call or e-mail us:
(406) 825-6440 / rcmerc@blackfoot.net

August 15, 2017

     The past week has seen some very good production since the lower section of the river reopened.  Both dries and nymphs are working, but most of the bigger fish have been caught subsurface on patterns like the Jumpin Jack Flash and a basic brown girdle bug.  Here are a couple nice trout that were caught in the past week on these patterns:

      For dry flies, try some caddis, small mayflies, terrestrial patterns, and maybe some spruce moths if you see them flying, or go attractor like the Purple Haze or a Royal Wulff or Red Machine.  There are lots of different dries to choose from, and many anglers will use a dry/dropper combo this time of year. 

     I've had a few calls asking about hoot owl restrictions, and just to clarify, Rock Creek has none.  The highest water temp we've reached recently is about 64 degrees, and the fish aren't stressed.  The road remains closed above Harry's Flat Campground all the way up to Gilles/Bohrnsen Bridge, but the firefighters are doing a great job on it, and we'll hopefully have some fishing up there before the fall season is upon us.  We will have to wait and see, but we will be sure to provide you an update once things are contained up there.

     In the meantime, come fish the first 17 miles near us!  The weekdays in particular are very quiet, so there is some excellent water to fish if you can make it out during that time.  More soon!

Questions or comments?  Please call or e-mail us:
(406) 825-6440 / rcmerc@blackfoot.net