Delayed Harvest Artificial Lures Only is the most useful special regulation Pennsylvania has, and most anglers who fish stocked trout never touch it. It solves the two biggest problems with put-and-take trout fishing. The fish do not all disappear in three weeks, and the water does not close for six weeks in late winter.

DHALO launched in 1983 with a simple design goal: keep stocked trout available later in the season by delaying when anglers can harvest them. Four decades later it is the backbone of Pennsylvania's fall, winter, and early spring trout fishing.

How the Regulation Works

DHALO sections run under 58 Pa. Code section 65.6. The structure is worth memorizing because it changes what you can do depending on the date.

Confirm current rules on the PFBC trout fishing regulations page. Section limits get revised at quarterly Commission meetings and waters occasionally move in or out of the program.

The Calendar This Creates

Think of a DHALO section as running three distinct seasons.

Mid-February to Mid-June: The Section Nobody Else Can Fish

Regular stocked trout waters close to all fishing from mid-February until 8 a.m. on opening day. DHALO water stays open. For roughly six weeks while everyone else is watching stocking trucks and waiting, you can fish.

These sections get preseason stockings like everything else, so by March they hold fresh fish plus whatever carried over from the previous year. Nobody has removed a trout from that water since Labor Day. This is the single most overlooked opportunity in Pennsylvania trout fishing.

June 15 to Labor Day: The Harvest Window

Twelve weeks when you can keep three fish over nine inches. Water temperature is the limiting factor here rather than regulation. Many DHALO sections run warm by late July, and trout that survive do it in specific cold pockets. Fish early morning and target spring seeps and tributary mouths.

Day After Labor Day to June 14: Zero Harvest

Nine months of catch and release. Fish density compounds through this stretch, which is why a DHALO section in November holds more trout than almost anything else in the state. Sixteen of the 24 Keystone Select sections, which are DHALO water, also receive a fall stocking that adds to the population.

Where the DHALO Sections Are

Sections are distributed across all six PFBC regions. A partial picture of what is out there:

Southeast

Northeast

Sections in the Northwest, Southwest, Northcentral, and Southcentral regions follow the same pattern. Check the current regulations summary for your county, and use our Pennsylvania data page to see which sections carry a special regulation flag along with their planned allocation counts.

Twenty-three of the 24 Keystone Select sections are DHALO water, which means the biggest stocked trout in the state live under these rules. Our Keystone Select guide covers that program. For help reading section boundaries and allocation numbers, see our guide to the Pennsylvania trout stocking schedule.

Find the Delayed Harvest Section Near You

Our Pennsylvania data view flags stream sections managed under special regulations and shows planned stocking counts and scheduled dates by section. Free email alerts included.

See Pennsylvania Stocking Data

What Actually Works Under Artificial-Only Rules

The tackle restriction pushes a lot of bait anglers away from DHALO water, which is part of why it stays uncrowded. The restriction is less limiting than it looks.

Spinning Gear

Inline spinners in size 0 through 2 are the highest percentage search bait. Gold blades in stained water, silver in clear. Small spoons in the 1/8 to 1/6 ounce range fished slow across current seams pull the bigger carryover fish that spinners skip.

Countdown minnow baits in the two inch range in rainbow trout and brown trout patterns work well on carryover fish in fall and winter. Marabou jigs from 1/64 to 1/32 ounce fished under a small float cover cold-water fish better than anything retrieved. Black, olive, white, and pink are the four colors worth carrying.

Molded facsimiles of insects, worms, and fish eggs are specifically prohibited. Soft plastic trout worms and plastic egg imitations do not qualify as legal lures here. That trips people up every year.

Fly Gear

A four or five weight in nine feet handles most sections. Beadhead pheasant tails and hare's ear nymphs in size 14 to 18 under an indicator produce year round. Olive and black woolly buggers in size 8 and 10 get the larger fish. Sucker spawn in white and pale yellow is a proven DHALO pattern and it is a fly, so it is legal.

In fall and winter, drop tippet to 5X or 6X fluorocarbon and lengthen the leader. Carryover trout in a low, clear DHALO section in January have seen a lot of flies.

Why DHALO Fish Get Harder

A freshly stocked trout in a DHALO section behaves like a freshly stocked trout anywhere. It will eat a spinner on the second cast. Give it eight months of catch and release pressure and it turns into a different animal.

Carryover fish hold in specific lies rather than schooling. They face into current seams and take drifting food. They refuse anything with drag. They also grow, because they are eating real forage instead of pellets, and a stocked rainbow that survives a full year in a DHALO section is a legitimately good fish.

This is why anglers who fish DHALO water regularly stop caring about the stocking schedule. The population is there year round.

How DHALO Compares to the Other Special Regulations

Pennsylvania runs several special regulation programs, and the names sound similar enough to cause confusion.

DHALO is the middle ground. You get year-round access and a protected population without giving up harvest entirely or being restricted to fly tackle.

Reading a DHALO Section Description

PFBC describes these sections by physical landmarks rather than coordinates, and the descriptions can be dense. A typical one reads like this: 1.2 miles, from SR 4019, Dorlan's Mill Road, downstream to SR 4004, Dowlin Forge Road.

Three things to pull out of that. The length tells you how much water you have and helps you judge fish density against the allocation. The upstream and downstream boundaries are almost always road crossings or tributary confluences, which means you can find both ends on a map before you drive. And the direction matters, because upstream and downstream of those markers the regulations change back to standard stocked trout rules.

Boundaries are posted on the water. If you cannot find a sign, you are either outside the section or the sign is down, and neither one is a defense. Walk the boundary before you fish if there is any doubt.

The Citations That Happen on DHALO Water

Waterways conservation officers work these sections because the rules are specific and the violations are common.

Fishing the Harvest Window

The twelve weeks from June 15 through Labor Day are the only time you can keep a fish on DHALO water, and most anglers ignore them because summer trout fishing has a bad reputation.

June 15 through mid-July is the window worth taking seriously. The section is still holding the accumulated population from nine months of no harvest, water temperatures have not peaked, and the crowd from opening day is long gone. Three fish at nine inches is a real limit on water like that.

By late July, temperature becomes the limiting factor on most freestone DHALO sections. Fish early, target the coldest water in the section, and consider releasing everything if the water is above about 68 degrees, because a long fight in warm water kills trout regardless of how carefully you handle them.

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