Riddle Mountain Wild Horses: Why BLM's Emergency Gather Is Capped at 140

Riddle Mountain wild horses: what is happening right now

The Bureau of Land Management (BLM) begins an emergency gather of up to 140 Riddle Mountain wild horses on Tuesday, Oct. 20, 2026. The cap comes from a federal court: a preliminary injunction lets BLM remove only about one-third of the herd, so 278 horses must stay on the range.

The Riddle Mountain Herd Management Area (HMA) sits about 50 air miles southeast of Burns, Oregon. It is rolling hills, steep slopes, buttes and broad valleys. The horses are known for dun, grulla and buckskin colors, often with dorsal stripes and zebra stripes on the legs.

The short version of how we got here:

• Late summer 2026: The Bald Mountain Fire burns through the HMA, which was already short on forage after a dry winter and drought.
• Early September: BLM plans to start on Sept. 9 and remove the entire herd. An advocacy group put the herd at about 418 horses; news reports at the time said about 400.
• Labor Day weekend: A judge issues a temporary restraining order (TRO), and BLM postpones.
• Oct. 15: U.S. District Judge Karin Immergut of the U.S. District Court for the District of Oregon grants a preliminary injunction that blocks the full removal but allows about one-third.
• Oct. 20: The reduced gather begins.

BLM's Burns District Manager, Don Rotell, framed it as protecting as many horses as the agency is allowed to. He also said BLM needs to move before late-fall rain limits access to the area.

What is a BLM emergency gather?

A gather (also called a roundup) is when BLM brings wild horses in off public land. Most gathers are planned: they go on a yearly schedule and aim to bring a herd toward its appropriate management level (AML), the number of horses BLM says the land can support.

An emergency gather responds to an immediate threat to the horses' survival. Typical triggers are wildfire, drought, lost water sources or disease.

How it differs from a routine roundup

That shorter paperwork matters here. On Sept. 4, BLM signed a Determination of NEPA Adequacy, which relies on earlier environmental analysis instead of a new one. Part of the plaintiffs' challenge focused on how BLM reached its decision.

Why fire and drought trigger one

Horses on open range live on grass and shrubs. When fire strips that forage in late summer, there is little time for regrowth before winter, and drought had already thinned what was left.

BLM says about half the HMA lost forage in the Bald Mountain Fire (earlier BLM statements in September gave a higher share). Burned ground also needs rest: BLM says grazing pressure keeps newly planted grasses from taking root and leaves soil open to erosion and invasive weeds. For the same reason, BLM worked with the local cattle permittee to pause livestock grazing in the area.

Why the gather is capped at 140: BLM vs. the advocates

Three groups sued: the Oregon Wild Horse Organization, the Central Oregon Wild Horse Coalition and Western Watersheds Project, represented by Greenfire Law. Here is how each side sees it.

BLM's reasoning

• The fire and drought left too little forage for the herd to get through winter.
• BLM needs to act before late-fall rain limits access to the area.
• Fewer horses on burned land lets newly planted grasses take root and helps protect the soil from erosion and invasive plants.
• BLM says it will keep working to match horse numbers to available forage.

The advocates' objections

• The original plan would have removed 100% of the herd. Plaintiffs said no more than 33 horses would have been returned, after at least two years in holding.
• They argued that a herd that small risks inbreeding. Expert testimony in the case put the minimum for genetic viability at 278 horses, the same number the injunction keeps on the range.
• They said the herd's AML of 33 to 56 horses was not set by site-specific analysis.
• They argued BLM decided on removal before finishing its environmental review.

What the judge found

According to the plaintiffs' summary of the Oct. 15 order, the judge pointed to problems with how BLM set the herd's AML and planned the removal, and raised serious questions about whether BLM fully weighed the genetic effects. She also questioned how reliable BLM's post-fire forage estimate was. The order is a preliminary injunction, not a final ruling, so the case continues.

The result is a middle path. BLM can remove about one-third of the herd now, and the range keeps the core group the plaintiffs said the herd needs.

What happens to the horses after the gather

BLM says gathered horses will be trucked to off-range holding facilities, where they get:

1. Veterinary evaluation soon after arrival.
2. Care, high-quality feed and constant access to fresh water.
3. Space that meets BLM's agency standards.

BLM hasn't named the facility. Once horses are evaluated and ready, some may be offered for adoption on the BLM Online Corral (wildhorsesonline.blm.gov). BLM will post progress, viewing and adoption updates on its 2026 Riddle Mountain gather webpage, including daily gather reports.

Thinking about adopting a Riddle Mountain mustang?

A freshly gathered wild horse is not a beginner project. If you're serious, here is BLM's baseline checklist:

• Age: you must be 18 or older, with no animal-cruelty convictions.
• Pen: at least 400 sq ft per horse (20 x 20 ft).
• Fence height: 6 ft for ungentled horses 2 and older; 5 ft for yearlings or gentled horses.
• Shelter, feed and water suitable for your region.
• Trailer: a covered stock or horse trailer with a rear swing gate.
• Fee: BLM lists a $125 base fee, but some adoption events use competitive bidding, so prices can be higher.
• Title: the horse stays federal property for at least one year; you then need a signed statement of good care to get title.

For real-world costs and alternatives, read our guide on how to adopt a horse. Our groundwork and behavior sections cover the basics of handling a horse that doesn't trust people yet.

How to watch the gather in person

The public and media can observe, but only on BLM's terms:

• Reservation only, 10-15 people per viewing day, first come, first served.
• Email the reservation contact listed on BLM's 2026 Riddle Mountain gather page. Phone and voicemail requests are not accepted.
• Deadline: 4 p.m. the day before you want to go, and wait for email confirmation.
• Very early start: meet at the Burns District Office between 4:30 and 6 a.m. to caravan to the site with BLM escorts.
• No pets, under any circumstances.
• First-time observers get priority, and viewing can change or be canceled on short notice for weather, safety or operational reasons.

Dress for cold desert mornings and bring water, food and binoculars. Observers must not disrupt the operation or put the animals or staff at risk.

What to watch next

• The daily gather reports on BLM's Riddle Mountain page, which show how many horses have been gathered and shipped.
• The court case. The injunction holds while the lawsuit continues; watch for a final ruling or an appeal.
• Winter forage. BLM says it will keep matching horse numbers to forage, so a later action is possible if conditions worsen.
• Online Corral listings. Riddle Mountain horses may appear once vets clear them.
• The bigger picture. Riddle Mountain is one of many 2026 roundups. See our BLM wild horse roundup 2026 explainer and our story on Pryor Mountain wild horses for how other herds are being managed.

New to horses and curious about mustangs? Start with our breeds section and the glossary for terms like HMA and AML.