A snowbird route is a seasonal loop that keeps you in livable weather all winter by going south and dropping elevation, then reversing it in spring. It is a routing problem, not a list of places. The two things that actually control it are when northern roads close and how long the land manager lets you stay put once you get where you are going.
This page explains the mechanics. It does not name spots. The places that work are already well known, they fill up, and publishing coordinates for the quiet ones is how they stop being quiet and then get closed.
The migration is elevation plus latitude, and elevation matters more
Going south alone does not solve winter. Plenty of southern country sits high enough to snow. What makes the desert southwest and south Texas the winter destination is the combination: low latitude and low elevation, on top of large amounts of public land you can legally camp on.
That last part is why the pattern concentrates. The map of “mild in January” is much larger than the map of “mild in January and mostly federal land where dispersed camping is allowed.” The overlap is small, everyone can see it, and that is why the same general regions fill from November to March.
Our state pages show how unevenly public land is distributed, which is the underlying reason the migration funnels the way it does.
What sets the timing
Nobody leaves on a date. They leave when two things happen.
Going south, the trigger is the freeze and the roads. Mountain highways close for the season on weather, not on a schedule. CDOT’s own description of Colorado Highway 82 over Independence Pass is that it is typically open during the summer, from Memorial Day through November, depending on weather conditions, and it closes for the winter season when conditions require. When the passes shut, the high routes you would have taken are gone, and the shoulder-season camping above 8,000 feet goes with them.
Coming back north, the trigger is the reverse, and it is later than people expect. Snow lingers on north-facing roads for weeks after town is clear. When the high country opens walks through how to check a specific road for a specific year instead of guessing.
Between those two brackets, the practical driver is heat. The southwest becomes genuinely hostile by late spring, which is covered in desert camping in real heat. The migration is as much about leaving the desert in April as arriving in November.
The stay-limit math is the part people get wrong
Here is the constraint that shapes a whole winter. The BLM’s national camping page states that dispersed camping is generally limited to 14 days within any 28-day period, though specific stay limits vary by state and field office, and that after reaching the stay limit visitors must move to a new location, often at least 25 to 30 miles away.
Read both halves of that. The number varies by office, and the move distance is real distance, not the next pullout.
Now run it across a season. If you are on a 14-in-28 pattern with a 25-mile move requirement, a four-month winter is roughly eight relocations. That is the actual shape of the trip: not “park in the desert until March” but a rotation between a handful of areas, each with its own field office, its own rule, and its own posted signs.
Two things make that math worse than it looks:
- The window rolls. It counts your camping days inside a moving period, so leaving for a weekend and coming back does not reset anything. Stay limits explains how the counting works in detail.
- The rules are not uniform across your route. Two field offices 40 miles apart can give different numbers, and both are correct for their ground.
Also worth stating plainly: the limits exist to separate recreation from living on public land, and the agencies enforce that distinction. A camp that stops looking temporary is a different and worse problem than an accidental overstay.
The legal way to stay put: an LTVA
If the rotation is the part you do not want, the BLM sells the alternative. Long Term Visitor Areas are designated areas, concentrated in Arizona and southern California, where a permit buys a stay far longer than the dispersed limit.
Checked on the BLM’s La Posa page on July 18, 2026: the LTVA long-term permit is 180 dollars and covers use of BLM designated LTVAs continuously from September 15 to April 15, or any length of time between those dates. A short-visit permit is 40 dollars for any 14 consecutive day period in the same window. Outside the LTVA season, from April 16 through September 14, the same page lists 10 dollars per vehicle for day use, 15 dollars per vehicle overnight, or 75 dollars annually, and states the maximum stay is 14 days in a 28-day period. Prices change; confirm on the BLM’s page before you budget around them.
What you get for that is basic and useful: La Posa’s listed facilities include ADA accessible vault toilets, water faucets, and dump stations. What you also get is neighbors, in volume. That is either the point or the problem depending on what you came for. Long-term visitor areas covers the detail.
How to actually plan a route
Plan it as a sequence of legal stays with known resupply between them, not as a list of destinations.
- Pick regions, not sites. Decide which broad areas you want to be in each month based on elevation and latitude. Fine-grained site selection happens when you get there, using how to find sites and choosing a site.
- Look up the stay limit for each region before you go. Not the general 14-day pattern, the specific field office or ranger district rule for that ground. Where we have verified one, it is on the state pages; where we have not, we say so rather than guess.
- Chain the moves so each one lands near resupply. Your relocations are forced anyway, so spend them usefully: water, dump, groceries, fuel. See dump stations and fresh water.
- Budget power for short winter days. Even in the sunny southwest, December daylight is short and the sun is low. Power budget is the place to start.
- Leave slack. Weather, closures, and full areas all happen. A route with no give turns into camping somewhere you did not choose.
- Have a heat exit for spring. Decide in advance what temperature sends you north or up, and go when it does.
The sign wins, every time
Every number on this page comes from an agency page, and none of them override what is posted where you are standing. Field offices change stay limits, close areas, and impose fire restrictions during the season. The sign at the entrance and the current guidance from the office that manages that ground are the authority. If they disagree with this page, they are right and we are out of date.