Lost River Range Elk Hunting: Idaho's Borah Peak Country

Borah Peak stands at 12,662 feet. It’s Idaho’s highest point, and it anchors the Lost River Range — a compressed, dramatic series of fault-block mountains east of the Snake River Plain in Custer County. The terrain here is fundamentally different from the famous north Idaho wilderness country: drier, higher-relief, with more Great Basin influence in the lower zones. Sagebrush and mountain mahogany at 5,500 feet. Steep spruce-fir timber above that. Sub-alpine parks near the ridges at 10,000 feet.

The elk population is smaller than the Frank Church or Selway drainages. So is the hunting pressure. This is a specialist’s unit — the hunters who find the Lost River elk are often the only people in their drainage for the entire week. If you’ve been chasing the same famous Idaho units that everyone else is applying for, the Lost River Range is worth understanding.

Unit Overview

The Lost River Range and adjacent Lemhi Range fall primarily within Idaho Unit 37 and portions of Unit 36. These are general hunting areas. Idaho general elk tags are valid here without a controlled hunt draw, which means the Lost River country is immediately accessible to any hunter who buys the appropriate license.

Specific controlled hunts within the Lost River area do require separate applications, and some of those draws are worth pursuing for the additional season flexibility and potentially better timing they provide. But the base general tag access is available over the counter. That OTC entry point — combined with genuinely low hunting pressure — makes this an underappreciated Idaho elk destination that rarely shows up in the magazine articles and forum discussions dominated by Frank Church planning threads.

The Country

The Lost River Range is high, dry, and exposed by northern Idaho standards. Multiple peaks exceed 12,000 feet and the range drops steeply to the Snake River Plain floor at around 5,000 feet in a horizontal distance of 10-15 miles. That’s extreme relief — terrain that creates dramatic vertical habitat stacking and predictable seasonal elk movement patterns.

Elk habitat in the Lost River runs from the sagebrush-mountain mahogany zone at 5,500-7,000 feet through spruce-fir timber at 7,500-9,500 feet up to sub-alpine parks near the 10,000-foot ridges. The drought-resistant character of the lower elevations means less water density than the Frank Church country. Water sources become the primary key to locating elk here, especially during warm early-season conditions. This isn’t a unit where you glass water tanks to find deer — it’s a unit where understanding which drainages hold year-round springs determines where you find elk in September.

The Fall Migration Pattern

Lost River elk make a predictable fall movement from high summer range on the peaks down into the lower sagebrush country as winter approaches. The timing tracks temperature and snowpack — heavy early October snow at elevation pushes elk into the lower basin areas where terrain eases and hunting access improves.

This migration pattern is the Lost River hunter’s biggest advantage. A hunter positioned in the transition zone between 6,500 and 8,000 feet after the first serious October storm often encounters elk moving through terrain they’ve occupied for months without any hunting pressure whatsoever. These aren’t educated, call-shy animals that have been pushed repeatedly since archery season opened. They’re elk that have spent a summer doing exactly what elk do when nobody is bothering them, and the first migration push of the season catches them moving predictably through country they’ve used every year of their lives.

September archery is a different kind of hunt. Bulls are in the high country, vocal and covering ground. You’re hunting on the elk’s terms and the elevation, not the migration, is your organizing principle.

General Tag Mechanics

Idaho nonresident general elk tags are valid in Unit 37 without a controlled hunt draw. The combination of OTC access and low relative hunting pressure makes the Lost River an entry-level Idaho elk option that doesn’t require years of accumulated preference points — and doesn’t require competing against the concentrated nonresident attention that Idaho’s Frank Church draws attract.

This matters for hunters who want to be in the field this season rather than next decade. The Lost River general tag won’t give you the same trophy ceiling as a Frank Church controlled hunt. But it gives you real Idaho elk hunting on genuine wilderness-adjacent public land, this fall, with a single tag purchase. That’s a different calculation than planning a multi-year points strategy, and it’s worth making seriously.

Bull Quality

Lost River elk in the general tag country aren’t in the 340 B&C category of a peak Frank Church controlled hunt. Mature bulls running 260-300 B&C is the honest range — respectable western elk that most hunters would be genuinely satisfied with. Not record-book country on a typical year.

What the Lost River offers that most OTC general areas can’t match is age structure. Lower hunting application pressure means fewer tags, which means fewer hunters, which means more bulls reach 5-6 years of age before running out of luck. A 5-year-old bull in the Lost River country that has avoided hunters for his entire life carries himself differently than a 5-year-old in heavily pressured OTC Colorado. He’s not educated in the specific ways that educated elk are difficult — wary of calls, call-trained, conditioned to associate human pressure with danger from every direction. He’s just an older elk in remote country. That’s a different hunt.

Access and Logistics

Mackay and Challis are the nearest towns to the Lost River Range. Mackay sits at the south end of the range and provides access to the lower Borah Peak area approaches. Challis has more hunting supply infrastructure — fuel, groceries, basic gear, and the Salmon-Challis National Forest district office that provides current road condition information for the Forest Service roads into the range.

Primitive camping is available throughout the National Forest. The terrain is accessible by truck to the forest boundary; backcountry access from there requires foot travel on the steep front-range approaches. The Lost River’s short horizontal distance from valley to ridgeline means your approaches are steep and gain elevation quickly. A 3-mile hike in this country might cover 2,500 feet of vertical — plan your physical prep with that grade in mind, not the gentler terrain of most Colorado national forest approaches.

Application Strategy

Buy the Idaho general elk tag immediately — no draw required, no waiting. That’s the first move.

Simultaneously apply for Idaho controlled hunts within the Lost River and adjacent Lemhi Range units that draw at low preference point totals. These controlled hunts can provide earlier archery season access, different weapon options, or timing advantages that a general tag doesn’t offer. Track your annual Idaho controlled hunt applications and preference point accumulation in the preference point tracker.

The Lost River is worth hunting on a general tag right now. Frank Church draws are a legitimate long-term goal — apply for them every year while you accumulate points. But the Lost River gives you a real Idaho elk experience on public land this season, without the decade-long wait. Run both tracks at the same time.

Current Idaho draw odds data for Unit 37 and adjacent units is available through the draw odds engine. The full Idaho draw odds breakdown is at /draw-odds/idaho/.

Sources & verification

Seasons, license fees, application windows, and draw structure for Idaho change every year. Always verify the current details against the official Idaho agency before applying or hunting.

• Idaho Department of Fish & Game — idfg.idaho.gov