Deep-Water Anxiety

Chironomids, way deep, for British Columbia’s hardest-fighting rainbows.

British Columbia
Trout in the Kamloops region grow to 10 pounds or more, but the average fish ranges between two and five pounds. When the bite is on, you can expect to land several fish like this each day. Photographed by Geoff Moore.
By Greg Thomas

If you’re planning to fish British Columbia’s southern interior this year, you’ll appreciate this piece of advice: Get a bigger net.

British Columbia
Photographed by Greg Thomas.

That’s what I learned in May when I drove from Missoula, Montana, to BC’s Merritt/Kamloops region to meet a photographer and noted Canadian fisheries biologist Brian Chan.

This area has been on my hit list since 1984, when my parents packed my sister and me into a pickup truck and headed from Seattle to Banff National Park for a summer vacation. I thought the trip was going to be all about fishing, but it turned out to be varied and include short hikes, wildlife viewing and soaking in hot springs. All good with me . . . except during summer, when the region’s lakes are ice-free and the fish are eating!

I sulked my way across the province and back, trying my best to ruin the trip for everyone—something that seemed rebellious and cool at the time but now causes immense regret and forever brands me as the spoiled youngest child. We did catch some trout on that trip, and while fishing from shore one day I watched a 15-pound mackinaw chase a small rainbow into a rock pile at my feet. That event is ingrained in memory and one of the reasons I decided to retrace tire tracks in May to see what I may have missed three decades ago.

British Columbia is saturated with lakes. You can’t drive far in any direction and not see an appealing sign promising prime fishing at the end of a dirt road. Some of the most productive and accessible of these lakes lie in the Merritt/Kamloops area, northeast of Vancouver, over the mountains and into arid, low-elevation sagebrush and grasslands country. Many of these lakes are shallow, nutrient-rich irrigation impoundments that offer longer growing seasons than those located farther north. That means fish grow fast here and sometimes can be found in big numbers.

According to Chan, there are 800 fishable lakes within an hour radius of Kamloops. One hundred twenty of these are stocked by the province. The others offer self-sustaining trout populations. The size of the fish depends on management strategies and the amount of pressure each lake receives. Suffice to say, there are multiple dozens of lakes that offer harvest restrictions, bait bans and single-barbless-hook requirements. Focus your eyes on the provincial fishing regulations, and you can find a lifetime of intriguing options that match those descriptions. Basically, you could visit the area, which is less than a three-hour drive from Vancouver and about four hours from Seattle, and jump from one lake to the next during the course of a week, camping or staying in motels or fishing lodges each night. Each day you’d have a fresh opportunity to take some extremely hard-fighting rainbows that range between 10 inches and 10 pounds. And this summer, unless things quickly change, your dollar will be worth a lot in Canada, meaning that a buck in the US is worth about a buck-thirty to the north.

No matter when you choose to fish the area, chironomids will be part of the equation. These seemingly insignificant aquatic insects, which range from a quarter-inch to an inch long, make up a majority of the trout’s diet and offer anglers an opportunity to dial in the fish’s behavior and possibly hook scads of rainbows each day. And if you want to learn how to fish chironomids, Chan is the man.

I didn’t go into this trip completely blind. I’d fished chironomids on Washington’s desert lakes and even in Montana on Georgetown Lake, Clark Canyon Reservoir and Duck Lake. But I’d done that while fishing from shore or in a boat, in shallow water, just 10 yards or so from the bank. When I met up with Chan, he motored us to a shoal on a 50-acre lake he likes and told me to tie 20 feet of tippet to my existing leader. “Put a lead weight on your fly and drop it to the bottom,” he added. I didn’t know how to reply, let alone how I might cast the entire contraption. Chan, sensing my hesitation said, “It’s not pretty.”

The weight, of course, was not to be cast. Instead I clipped the lead weight to my fly and dropped it overboard. When it hit bottom and my leader went slack, I raised the weight six inches off bottom, pegged a cork to the leader at the water line, and then hand-lined the fly in and removed the lead. This way, Chan explained, I could cast (huck, chuck, whip and duck might be a more accurate description) the fly to a likely spot and let it sit, knowing it would be about six inches off bottom, right where he’d marked fish on the sonar. A bead head on the chironomid plus a barrel swivel placed eight inches above the fly were all the weight needed to reach that depth. Once I’d cast the fly 10 feet it became a waiting game.

Two nights prior, while fishing out of Corbett Lake Lodge, southeast of Merritt, I had told a couple of anglers that I wouldn’t participate in the deep-water chironomid game. “Too slow,” I’d said, adding, “I’d probably fall asleep in my pram.” A guy who said he’d fished the lake for something like 46 years pulled me aside and said, with authority, “Don’t overlook it. Fishing chironomids is not boring.”

Fair enough. But I didn’t fish chironomids the following day at Corbett. Why would I? There was an excellent late-morning Callibaetis mayfly emergence that had the fish slurping below the surface and on top and, with calm conditions, I could sight fish for ’bows that ranged from 17 to 21 inches. For a while the fishing was hit and miss, but around noon the number of rises seemed to quadruple within five minutes. I moved the pram to where I’d just seen five rises and dropped anchor in six feet of water. Then I tied on a Callibaetis emerger and threw at the first passing fish, which ate without hesitation. Two hours later I’d landed, perhaps, 20 trout—nothing greater than three pounds, but nothing smaller than 16 inches.

Those are typical fish at Corbett, although bigger trout do swim there. These are also standard sizes (although fish to 10 pounds are possible) for adjacent Douglas Lake Ranch, which offers 12 private lakes ranging from 10 to 65 acres, including the legendary Stoney and Minnie lakes. Corbett and all of the lakes on Douglas are managed as fly-fishing only and offer enough hatches to keep anglers busy for a full week through the entire season, which basically runs from ice-out in March to ice-on sometime in November. You can find these types of lodge offerings throughout south-central British Columbia, making it a dream landscape for DIY and lodge-based anglers alike.

British Columbia
In the shallows at Corbett anglers can concentrate on Callibaetis mayfly emergences and shallow-water chironomids. (Photographed by Geoff Moore.)

When fishing with Brian Chan, you really don’t have an option to not fish chironomids. He is the chironomid king, and when I asked him which is his favorite way to fish, he answered: “Chironomids, underneath, especially later in the season when the ‘bombers’ come off.” Bombers are inch-long-or-longer chironomids that emerge later in the summer—often in August—that trout really seem to key in on.

Not that these fish shied away from our size 14 and 16 imitations. In fact, it didn’t take long for Chan to reel in a nice fish about 17 inches long that was very well fed and looked as if its belly were about to explode. But he’d expected better. More action. Back-to-back hookups. Multiple doubles. High-fives all around. And that wasn’t happening. So before releasing this fish, Chan stuck a tube in its throat and withdrew the contents of its stomach. Chan pumped the contents into a small, clear vial, raised it to the sun and said, “That’s not good.”

Inside the vial were tiny creatures called daphnia, aka water fleas. They were too small to match with our flies, and if all the trout were keyed in on them, we were in trouble. Fortunately some of the trout preferred chironomids, and we hooked a fish here or there during the next couple of hours. Later Chan motored the boat around until he found what he wanted on the sonar: a pack of large fish in a concentrated area just off bottom in 23 feet of water. He carefully positioned the boat, dropped the bow and stern anchors, and said, “They’re right beneath us.”

British Columbia
Photographed by Geoff Moore.

I cast my outfit as far as I could (which basically meant I was fishing under the boat) and let the cork bob in the chop. Chan did the same with an identical cork, tippet and fly. Not long after, I was hooked up to a very nice fish—maybe a five-pounder. At Corbett the rainbows had been acrobats; here they acted like vampires, avoiding the light and boring deep anytime they got near the surface. I was fishing a fast-action 5-weight rod and wishing I was throwing a 7-weight. My right wrist and forearm burned. So how long did I fight this fish? Four minutes? Five minutes? That’s a long time to fight a trout, but I think that guess is accurate. These rainbows were as strong as any I’ve fought, bending the rod to what I thought would be the breaking point and repeatedly diving for bottom just when I thought they might roll over on their sides and slide into the net.

While fighting that fish, I said, “This is a whale.”

Chan corrected me and said, “Actually it’s probably a Blackwater River-strain or Pennask Lake-strain rainbow.”

Blackwater and Pennask rainbows are stocked in many of British Columbia’s inland lakes, and each provide appealing traits. Blackwaters, having developed in a river system with competing fish, are very aggressive and can grow to large size, as evidenced at Sheridan Lake near 100 Mile House, where fish average four to five pounds and stretch to 20 pounds. Blackwaters are opportunistic and readily eat aquatic insects and other prey, such as leeches. Pennask rainbows are keyed in to aquatic-insect hatches, making them favorite targets with a fly. And best: They are prone to jump when hooked.

Trip Notes
When: According to fisheries biologist Brian Chan, aquatic-insect hatches on British Columbia’s southern interior lakes occur earlier than they used to. Hatches that previously began in April and May now are going strong in March. And the fishing season also extends deeper into fall, with good options sometimes extending into late November.

Flies: You’ll want to pack a variety of flies while fishing the Merritt/Kamloops region. Expect chironomids to produce nearly every day. Callibaetis are key insects too. Leeches are abundant in all these fertile lakes, so you’ll want to carry a variety of imitations in various colors and sizes to match them. When the damsel hatch is on, anglers often take good fish in rapid succession stripping damsel nymphs. In spring and summer anglers also look for specific trout cruising the shallows picking off adult damsels. During fall, backswimmers can provide great action.

Flies used on the trip

Mahalo Midge
Tim’s Chromie
Chiron Pupa
Chrome Chironomid
Ice Cream Cone Chironomid

Pig Pen Leech
Tungsten Junior Mint
Callibaetis Cripple
Parachute Callibaetis
Parachute Adams
Tom Thumb (just for the classic feel)

Rods: To cast 20 feet of tippet and a strike indicator, you’ll want a mid-to-slow-action rod. That slower action also helps to preserve your tippet when a five-pounder eats a chironomid you’re fishing off of 5X. During this trip, I used a 9-foot 5-weight Sage XP, which was great for fighting fish but not the best for casting all that tippet. For fun I also used a 7-foot 5-weight Fenwick Fenglass rod, which offered the medium action I needed to set up on big fish with light tippet but proved a little short when managing fish near the boat. For casting streamers and leeches off full sinking lines, I used a 9-foot 7-weight Thomas & Thomas Solar.

Lines: You’ll need a floating line to fish chironomids under an indicator, and you’ll want a fast-sinking line to get leeches down to the bottom quickly.

Boats: Johnboats with outboard motors are allowed on some lakes. Prams with oars and electric motors are allowed on most waters. Float tubes and other single-person craft are decent options too. When fishing these lakes, most anglers use a two-anchor system: one mounted on the stern and one on the bow. These anchors allow anglers to position a boat favorably to the wind and keep it in place. If using a single anchor, the boat is likely to swing on its rope in the wind, which prevents anglers from keeping their chironomids and leeches in the prime zone. To locate the prime zone, anglers often rely on electronics. It pays to invest in sonar before fishing these lakes.

Getting There: Anglers can fly into Kamloops, rent a vehicle and drive to various lakes. But beware: You’ll need a boat to excel on these waters. Fortunately, many area lodges, including Corbett, offer prams for rent. A great option is to drive through “beautiful British Columbia” and tow your own watercraft. The area is just more than three hours from Vancouver and just about four hours from Seattle.

Lodging: Motels and hotels abound in Merritt and Kamloops. Private lodges are also found in abundance. I stayed at Corbett Lake Lodge (250-378-4334) during a portion of my trip. Corbett is a great option for anglers who want too stay right on the water, in practical cabins offering kitchens and showers, with their prams tied to a nearby dock. Gourmet meals can be included in your stay.

More Information: Thompson Okanagan Tourism Association ; Thompson Okanagan Travel Experiences Guide; Tourism Kamloops. —G.T.

When discussing these fish, Chan chuckled and said, “There’s another type of fish in these lakes, and you’ll know when you hook one.” These fish, he explained, are mistakes from the triploid process, which, in layman’s terms, places trout eggs in a pressure chamber at a hatchery facility to produce sexually sterile females that won’t interbreed with native trout stocks, making them ideal for stocking in BC’s interior lakes. Occasionally one of these fish turns out to be a mutant male that produces milt but does not possess a vent to release it. Chan added, “They fight like they are mad, but when you land one, they roll over and seem to say, ‘Please, just kill me now.’”

“Oh, blue balls,” I said. “No wonder they want to die.”

Chan works with the Freshwater Fisheries Society of BC, which runs the provincial fish-stocking program with a goal to bring more people into fishing and to sell more fishing licenses. He’s a fish guru and a highly respected angler and demonstrates a great sense of humor. After I’d hooked several fish in a row—as his flies, which were just a few feet away from mine, went untouched—he said, tongue in cheek, “I don’t get it. We’re using the same flies, same leaders and tippets, and I soaked our chironomids in the same shrimp oil . . . . I even tried to poach your water and couldn’t get a bite. I’m going to fish the other side of the boat.”

British Columbia
Photographed by Geoff Moore.

Acting as if he were upset, he swiveled in his chair and cast off of the opposite side. And that’s all it took.

For a half-hour or so Chan was into rainbows like you’d expect the chironomid king to be: missing a strike here, setting the hook securely there, and admiring these beautiful fish before slipping them out of the net and back into the lake. When clouds built to the west and thunder boomed overhead, we reeled in and called it a day.

The following morning I fished with Geoff Moore, a photographer and representative for the province’s Cariboo Chilcotin Coast Tourism Association. We launched his johnboat onto the lake and went to work using the exact tactics Chan taught us the day prior. With a twist. Instead of a chironomid Moore tied on a size 10 olive leech and quickly had a couple takes. And shortly after he had a fish in his net. That’s when I realized that these tactics could be used on any trout lake, whether the fish were feeding on chironomids, scuds, leeches or a mix of all. The only thing you’d have to do is figure out at which depth the trout were feeding and put a fly on their noses.

A couple days later Moore and I were hauling his boat out of the water and calling an end to the trip. We’d caught lots of trout, including some that spilled out of either side of Moore’s undersize net. And we’d learned tactics we could apply on our home waters.

During the 10-hour drive home, I had plenty of time to consider that family vacation 30 years ago. I’m still not proud of how I acted, and I fear that karma will make me pay for it when my daughters soon hit their teenage years. But there was a reason I acted that way: The stillwater trout fishing in British Columbia’s southern interior is as good as it gets, and it’s difficult for me, even as an adult, to pass a lake or even a road leading to an unseen lake, without wondering what might be finning in each and wanting to find out at that very moment.

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Greg Thomas
About Greg Thomas 14 Articles
Greg Thomas is Fly Rod & Reel’s editor. See more of his work at

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