Work in progress — figures marked “needs source” are not yet verified. We would rather show you that than quietly round up.
Five anglers spaced down a misty river at dawn, casting, with forested hills behind
Lower Mountain Fork River · McCurtain County, Oklahoma

Oklahoma is a warmwater state.
For twelve miles, it isn't.

Water temp right now
70°
Flow
148cfs
Live · USGS 07339000

Two Oklahoma TU chapters are putting this river forward as a Trout Unlimited Priority Water.

That designation moves a river from somewhere volunteers work on weekends to somewhere an organisation commits to for the long haul. Getting it takes evidence. This site is where we keep ours.

Downstream from the dam1 / 5
0.0river miles
River mile 0

Broken Bow Dam

Water leaves the bottom of the reservoir instead of the top, and it leaves cold. That single engineering detail is the only reason trout live in this state. Everything downstream depends on it.

DamRe-regParkZonesWarm

What the river carries

12
Miles of coldwater habitat

Broken Bow Dam down to the US-70 bridge, about five of those miles inside Beavers Bend State Park.

—
Angler days per year

Nobody has published a creel survey for this river. Getting one is near the top of our list.

Needs source
—
Annual economic impact

No regional economic study of this fishery exists yet — though it is the closest year-round trout water to Dallas–Fort Worth, roughly 200 miles away.

Needs source
Year-round
Trout fishery

Unusual this far south. Most Oklahoma trout water is seasonal put-and-take; the dam releases cold water from the bottom of the reservoir all year.

What we stand to lose

A river this narrow has no margin.

Discharge, last 7 days · USGS 073390003× swing, peak to trough
300338 cfs
Oct 30Logarithmic scaleNow

Every spike is a hydropower release. Between them the river falls away to baseflow. This is one ordinary week — not a flood, not a drought — and the fish live through all of it.

The national picture

There is a hole in the map,
and we are standing in it.

Trout Unlimited's Priority Waters map covers 32 states. Eighteen have none at all, and they are not scattered — they sit together through the middle and south of the country. Oklahoma is one. So are Texas, Arkansas, Missouri, Kansas and Louisiana, every one of them a neighbour.

TU describes its approach as a portfolio — spreading risk for trout and salmon across a variety of habitats and populations. A year-round coldwater tailwater at the southern edge of where trout can live is not more of what the portfolio already holds. It is the kind of thing a portfolio is missing.

We are not asking to be ranked above a river in Montana. We are asking why an entire region of the country has nothing on the map at all.

See TU's map ↗
Priority Waters by state · read 2026-11-06
Trout Unlimited Priority Waters by stateA tile grid of the United States. 32 states have at least one Priority Water; 18 have none. Oklahoma, home of the Lower Mountain Fork, is among those with none, as are its neighbours Texas, Arkansas, Missouri, Kansas and Louisiana.AKMEVTNHWAIDMTNDMNWIMINYMARIORNVWYSDIAILINOHPANJCTCAUTCONEMOKYWVVAMDDEAZNMKSARTNNCSCOKLAMSALGAHITXFL
Has Priority Waters (32)None (18)Oklahoma

An empty state can mean two things: that TU looked and found nothing that met the bar, or that the state-by-state work simply never ran there. Those lead to very different conversations, and we would rather ask than assume.

The evidence

Everything here
has to be checkable.

A reviewer at Trout Unlimited has limited time and no reason to take our word for anything. So the library grades its own sources, says plainly which documents nobody has obtained yet, and separates what the state has published from what a guide told a magazine.

Open the document library →
Documents in hand
5
Still to obtain
17
The one that decides it
A study showing trout spawn here on their own. Trout Unlimited's language is wild and native — so that single document is worth more than everything else in the library put together.

Put your name
on this river.

Trout Unlimited weighs local support when it decides where to commit. Every name and ZIP code on this list is part of the record we submit.

Opening shortly

The list isn't open yet.

We would rather not take your details than take them and lose them. Sign-ups open as soon as the list has somewhere proper to live — check back, or catch one of the chapters at a meeting in the meantime.