Deer Rut 2026: Peak Breeding Dates by State

Every November the internet fills with rut predictions built on moon phases, cold fronts and gut feel. Meanwhile the actual answer sits in agency reports: biologists measure fetuses from does harvested through winter, back date each one to its conception day, and publish the distribution. That is a measured record of when breeding happened, run by the same agencies that manage the herds.

10 of the 44 states here publish conception date work: Pennsylvania, New Jersey, North Carolina, Florida, Alabama, Mississippi, Louisiana, Illinois, Texas and Arkansas. Their windows are badged as measured. Every other state’s page quotes its agency’s published rut description and is badged as a description.

Ordered by when each state’s window opens, running down the deer year from the earliest northern openings to the last Gulf coast parishes in late winter. The evidence column tells you whether the window is measured from fetal data or taken from the agency’s prose. A peak marked with an asterisk is our midpoint of the published window rather than a date the source names.

West of the plains the question changes species. Mule deer run a slightly later November and December rut; the coastal states add the Columbian blacktail, and Alaska’s deer is the Sitka blacktail, rutting in November among the islands of the panhandle. These pages cover whichever species each state’s agency actually documents, labelled per species, rather than pretending the whitetail calendar applies everywhere: North Dakota, New Mexico, Utah, Colorado, Wyoming, Montana, Idaho, Washington, Oregon, Alaska and California.

• West Virginia conception peaks November 14 to 17. Circulates widely and is attributed to DNR fetal data, but appears only in third party media quoting agency biologists; no agency page or document carries the dates, so West Virginia has no page.
• Tennessee conception peaks November 17 to 25 by region. Media only. TWRA itself publishes a November peak inside a September to February spread and no regional conception dates, so the page carries what the agency states.
• Arizona Coues deer rut December 20 to January 15. Repeated across hunting outlets and absent from the Game and Fish Department’s own pages, so Arizona has no page rather than one built on secondhand dates.
• New Mexico rut late November in the north to mid January in the south. Traces to a university extension publication rather than the wildlife agency. The page carries the agency’s own wider October through January window instead.
• Wyoming rut kicks off in early November and peaks mid month. Stated by hunting outlets, not the agency. The Wyoming page instead shows a back calculation from the agency’s own gestation and fawning numbers, labelled as ours.
• The moon phase sets the rut. Busted by an agency’s own magazine: Nebraska Game and Parks cites the Penn State and Pennsylvania Game Commission examination of 3,507 road killed does, which found the median conception date held around November 13 for adults regardless of the full moon’s date.
• Cold fronts cause the rut. Texas Parks and Wildlife answers this one directly in its conception study: increased buck movement in cool weather feeds the idea, "However, this theory is disproved by white-tailed deer breeding in tropical climates." Weather moves visibility, not conception.
• Alabama’s 2019 county rut map. The map’s methodology is quoted from the agency’s own bulletin, but the 2019 PDF itself now returns a 404, so the Alabama page cites the bulletin text rather than the dead file.

The rut shares its weeks with the best of the season: fall foliage, first frost dates, the elk rut a few weeks earlier, and monarch migration passing through the same fields.