Bill Edrington says that the famous Arkansas River Mother's Day caddis hatch is a misnomer, because if you wait until May 14 to start fishing the Arkansas, chances are you will have missed most of the event. This hatch usually begins in April, leading Edrington -- owner of the Royal Gorge Anglers shop in Cañon City -- to call it the Arkansas' Tax Day caddis hatch.

Alas, traditions die hard. This annual spring event has attained legendary status as the Mothers' Day hatch, attracting enthusiastic flyfishermen from virtually every part of the civilized world. The Arkansas River from Cañon City upstream to Buena Vista is home to this phenomenal caddis hatch -- an event celebrated in Salida by the annual Caddis Festival.

In March, emerging blue-winged olives serve as the harbinger of bigger things. Sometime in early to mid-April, as the water temperature creeps past the magical 50-degree mark, small dark caddis mystically appear near Cañon City. As the hatch increases in intensity, the caddis move upstream, bringing Arkansas trout boiling to the surface and dismissing all inhibitions as they gorge on zillions of Brachycentrus occidentalis. At times, the caddis appear in blizzard-like swarms that have literally left anglers with blurry vision and made it difficult for them to breathe.

Weather conditions dictate the rate of hatch advance upstream, averaging 7 to 8 miles per day under normal conditions. The hatch continues until spring run-off blows out the Arkansas sometime later in May. (Another reason you don't want to wait until Mother's Day to fish here.)

During the hatch, the Arkansas may be flowing quite strongly as run-off nears, and wading can be difficult to hazardous.

THE ARKANSAS
Thousand of tiny rivulets originating in the high mountain snowpack of Colorado's Continental Divide race down mountain slopes near Leadville to create America's fourth-longest river. The 13,000- and 14,000-foot snow-clad peaks of the Collegiate, Sawatch, Mosquito and Sangre de Cristo ranges provide clear, free-flowing water for the Arkansas' 300-mile run through Colorado. The river's initial 150-mile segment, from its alpine origins to the city of Pueblo, supports a brown trout paradise complemented by some rainbows and cutthroats.

The upper Arkansas is also popular among whitewater enthusiasts. Fortunately, rafters and fishermen have established a cordial relationship, and anglers come here prepared for midday "rubber hatches."

Seriously poisoned by tailings from the region's historic mining industry, the Arkansas recovered following a 1993 Superfund cleanup that in turn led to healthier, longer-lived trout. Today it supports some 4,000 trout per river mile. Clean, healthy water and a strong insect forage base produce fish averaging 12 to 14 inches, with some exceeding 16 inches.

The Arkansas wasn't always a prolific caddis water. Upstream water-storage managers were encouraged to maintain natural water flow levels in the river by increasing springtime flows to scour the river bottom, and then reduce flows in summer. They agreed to this plan and, as a result, caddis and other insects proliferated.

About 60 percent of the river from Salida to Cañon City is open to the public, with the remaining 40 percent in private control. Most public access points are well marked.

EQUIPMENT & TECHNIQUES
The Arkansas' currents can be quite strong, and its rocks slippery. Wading staffs are common and felt-soled shoes are necessary. Although lightweight waders will work, I sometimes wear neoprene and carry raingear to defeat unpredictable weather.

I prefer a 9-foot, 4-weight rod for dry flies and a 5-weight rod for sub-surface fishing. A 9-foot leader tapered to 4x or 5x connected to a floating line is adequate.