What the rulebook does not say

Three silences

New Mexico's fishing rules run to fifty-two pages. They are clear, specific and per-water, and they are the only thing that governs what you may legally do.

They are also silent on three things that decide whether trout live, and the silences are worth knowing about because most anglers assume the opposite.

There is no water-temperature rule. Searched in full: no threshold, no thermometer mention, no degree figure anywhere in the booklet. Nothing stops you fishing a small creek at seventy-five degrees, and nothing tells you not to.

There is no spawning protection. The word "redd" appears zero times. There is no closed season for brown trout anywhere in the state, no size limit, no seasonal bag reduction and no gear restriction triggered by the fall spawn. Every seasonal trout closure in New Mexico closes the spring, not the fall.

There is no mandatory harvest. Where the state wants nonnative trout removed it takes the bag limit off, which is an invitation. The only mandatory-kill rule in New Mexico applies to northern pike at one lake.

Why a silence is not an oversight

It is tempting to read a gap in a rulebook as a mistake. Mostly it is a choice about what regulation is good at.

Rules have to be enforceable, and a temperature rule is close to unenforceable across a state where a stream at 7,900 feet can run warmer than a tailwater 2,000 feet lower on the same weekend. Rules also have to be written a year ahead, and a spawn does not keep a calendar.

So agencies regulate what they can measure and defend: limits, seasons, gear, waters. Everything else falls to the person standing in the river.

That is not a failure of the rulebook. It is the shape of the job.

What this site does about it

Two different kinds of sentence, kept apart on purpose.

"The law requires this" appears only where a published regulation says so, with the source and the date attached. Bag limits, permits, tackle restrictions, closures.

"We are asking you to" appears where there is no rule and there is still a right answer. Pinching barbs. Carrying a thermometer. Walking around gravel in October. Stopping at 68 degrees.

Those two never share a sentence, and the distinction is the most important editorial rule on this site. A page that dresses an ethic up as a regulation cannot be trusted on the actual regulations, and a reader who catches it once is right to stop believing the rest.

It also cuts the other way. Where the guidance here comes from another state's agency, because New Mexico publishes none, that is said plainly. Wyoming's temperature thresholds are Wyoming's. Presenting them as New Mexico's would be a fabrication, and a convenient one.

The two questions worth asking yourself instead

Since the rulebook will not answer them:

Is this water too warm today? Not "is it high," not "is it early in the season." Measure it.

Is what I am about to do defensible if the fish does not survive it? A long fight in warm water, a photograph that takes ninety seconds, a fish held up by the jaw. Each of them is legal everywhere in New Mexico and each of them kills fish.

Neither question has a citation. That is exactly the point.