Sun Valley - Bald Mountain
Overview
Sun Valley has a claim that few ski resorts in America can match: it was the country’s first resort built specifically as a ski destination, rather than one that grew organically out of a mining town, a ranch, or a local ski club. Union Pacific Railroad chairman W. Averell Harriman developed it to give his passenger trains a reason to run west in winter, and it opened December 21, 1936 on the 3,888-acre Brass Ranch, built in just seven months for around $1.5 million. Publicist Steve Hannagan gave the resort its name and its tagline, “Winter sports under a summer sun,” and the marketing worked well enough that Sun Valley became a fixture of American celebrity culture almost immediately — Ernest Hemingway finished writing For Whom the Bell Tolls in a Lodge suite in the fall of 1939, and Gary Cooper, Clark Gable, and Marilyn Monroe all passed through in the years after.
The resort’s other lasting contribution to skiing is mechanical rather than cultural: the world’s first chairlifts went up at Sun Valley in the fall of 1936, on Dollar and Proctor Mountains, engineered by Union Pacific staff in Omaha specifically to move skiers faster than the rope tows of the era allowed. One of those original lifts was eventually relocated to Mount Eyak in Alaska, where it’s reportedly still running today, making it the oldest operating chairlift in the world. That early history centers on Dollar Mountain, the resort’s smaller beginner hill; the numbers here describe Bald Mountain, Sun Valley’s main mountain and the one most visitors ski, with a 1,024.7m vertical drop from a 1,755.6m base to a 2,780.3m summit across 142 runs and 79.34km. The terrain splits toward the ends of the difficulty scale — 32.66km easy and 27.57km advanced, with a comparatively thinner 19.01km intermediate band between them — served by twelve lifts including a gondola and ten chairlifts.
Sun Valley sits on the Ikon Pass (7 days, no blackout) and Mountain Collective (2 days, no blackout), though it isn’t included on the Ikon Base Pass. Friedman Memorial Airport in nearby Hailey, about 19.7km from the resort, is both the closest airport and Sun Valley’s listed gateway, keeping the flight-to-lift transfer short for a resort tucked into central Idaho’s mountains, well over 140km from the nearest larger airport in Boise.
The terrain’s shape on Bald Mountain reinforces why some longtime visitors describe the mountain as having a gap in its middle: 32.66km easy and 27.57km advanced together dwarf the comparatively thin 19.01km of intermediate terrain, so skiers tend to describe the mountain as either gentle or demanding, with less of a gradual, groomed-blue bridge between the two than at many other big Western resorts. That’s part of what keeps Bald Mountain’s reputation intact among strong skiers even as Sun Valley overall markets itself on history and hospitality as much as on difficulty.
Key stats
Official website — Last checked 2026-09-13
Lifts by type
| Type | Count |
|---|---|
| gondola | 1 |
| chair lift | 10 |
| magic carpet | 1 |
Runs by difficulty
| Difficulty | Distance |
|---|---|
| easy | 32.66 km |
| other | 0.05 km |
| novice | 0.04 km |
| advanced | 27.57 km |
| intermediate | 19.01 km |
Maps
View official Sun Valley - Bald Mountain trail map (page) →
Run & lift overview
Sun Valley - Bald Mountain: 142 runs, 12 lifts. Drawn from OpenStreetMap run and lift data — not the official Sun Valley - Bald Mountain trail map. © OpenStreetMap contributors, OpenSkiMap (ODbL).
Typical conditions by month
Monthly conditions data for Sun Valley - Bald Mountain is not yet available.
Lift tickets & passes
- Ikon Pass — 7 days, no blackout
- Ikon Base Pass — No access
- Mountain Collective — 2 days at this destination, no blackout dates
Getting there
Nearest airports
- Friedman Memorial Airport (SUN) — 19.7 km straight-line
- Joslin Field Magic Valley Regional Airport (TWF) — 132.1 km straight-line
- Boise Air Terminal/Gowen Field (BOI) — 148 km straight-line
Nearest cities
- Boise, Idaho — 146 km straight-line
- Salt Lake City, Utah — 383.2 km straight-line
- West Valley City, Utah — 385 km straight-line
Also covered by
Where to stay
A dedicated lodging guide for Sun Valley - Bald Mountain is not yet available.
Nearby resorts
- Soldier Mountain Ski Area — 41 km straight-line, 424.7 m vertical
- Bogus Basin Mountain Recreation Area — 137 km straight-line, 545.3 m vertical
- Pomerelle Mountain Resort — 163 km straight-line, 287.4 m vertical
- Tamarack Resort — 180 km straight-line, 840.2 m vertical
- Brundage Mountain — 203 km straight-line, 525.6 m vertical
FAQ
- How big is Sun Valley's Bald Mountain?
- Bald Mountain, the resort's main ski mountain, has a 1,755.6m base and a 2,780.3m summit, a 1,024.7m vertical drop, across 142 runs and 79.34km of terrain. Twelve lifts serve it, including a gondola, ten chairlifts, and a magic carpet.
- Why is Sun Valley called America's first destination ski resort?
- Sun Valley opened December 21, 1936, developed by Union Pacific Railroad chairman W. Averell Harriman specifically to draw train passengers west for a winter vacation — the first resort in the US purpose-built as a ski destination rather than growing out of an existing town or club.
- Did Sun Valley invent the chairlift?
- Yes — the world's first chairlifts were installed at Sun Valley on Dollar and Proctor Mountains in the fall of 1936, engineered by Union Pacific staff in Omaha to replace slower rope tows. One of those original lifts was later moved to Mount Eyak in Alaska, where it's reportedly still the oldest operating chairlift in the world.
- Is Bald Mountain good for beginners?
- There's a large easy share, 32.66km, but the mountain's identity leans toward stronger skiers, with 27.57km advanced against a comparatively modest 19.01km intermediate — a terrain profile Sun Valley skiers sometimes describe as missing an easy 'middle' between the green runs and the steeper terrain.
- What's Sun Valley's connection to Ernest Hemingway?
- Hemingway finished writing For Whom the Bell Tolls in a suite at the Sun Valley Lodge in the fall of 1939, part of a long history of celebrity visitors that also included Gary Cooper, Clark Gable, and Marilyn Monroe.
- Which pass covers Sun Valley's Bald Mountain?
- The Ikon Pass covers 7 days at Sun Valley with no blackout dates, and Mountain Collective covers 2 days with no blackout; the Ikon Base Pass does not include Sun Valley access.
- What's the nearest airport to Sun Valley?
- Friedman Memorial Airport (SUN) in Hailey is closest and the resort's listed gateway, about 19.7km away, with Boise Air Terminal (BOI) at 148.0km.
- How does Bald Mountain's terrain break down by difficulty?
- Of Bald Mountain's 79.34km, 32.66km is easy and 27.57km advanced, with a smaller 19.01km rated intermediate — the two extremes together outweigh the middle of the difficulty scale, an unusual profile compared to most destination resorts.
Data sources
Last verified: 2026-09-15
Base facts from OpenSkiMap (ODbL), OpenStreetMap contributors, Wikidata (CC0), OurAirports (public domain) and GeoNames (CC BY 4.0). See /data-sources/.