Mount McLoughlin

Oregon Class 1 Cascade Range

Rank 90

Elevation landscape

9,495 ft

Prominence height

4,475 ft

Difficulty signal_cellular_alt

Class 1

Est. Time schedule

6–9 hr

Distance route

10 mi

Vert Gain trending_up

4,000 ft

Mount McLoughlin ranks No. 90 among the Lower 48 Top 100 prominence peaks in the Prominence Registry, rising 9,495 feet in the Cascade Range of southern Oregon, with 4,475 feet of clean prominence. It is the dominant landmark of the Rogue River Valley and the highest point in Jackson County. Most hikers use Mt. McLoughlin Trail #3716 for 10 miles round-trip with 4,000 feet of gain on Class 1+ terrain; a Northwest Forest Pass, America the Beautiful pass, or $5 day-use fee is required at the trailhead.

Mount McLoughlin is the tallest Cascade volcano between Mount Shasta, about 70 miles to the south, and South Sister, roughly 120 miles to the north. At 9,495 feet it stands as the southern anchor of the Sky Lakes Wilderness, visible from both I-5 and US-97. The cone reads as a clean, symmetrical stratovolcano from the southwest and southeast; glacial erosion has carved the northeast flank into a broad amphitheater. Since 1926 the mountain's western slope has served as Medford's municipal watershed, its snowmelt filtering through basaltic andesite lava layers to emerge at Big Butte Springs below the city.

McLoughlin is young by Cascade standards. Most of the main cone is probably less than 200,000 years old, while the youngest flank flows are estimated at roughly 20,000–30,000 years old. Oregon Encyclopedia records Takelma, Shasta, and Klamath names and traditions associated with the peak, including Takelma Alwilamchaldis, Shasta Mayakax, and Klamath Kesh yainatat. The name McLoughlin, honoring Hudson's Bay Company Chief Factor John McLoughlin, appeared on maps by the late 1830s and was formally adopted by the Oregon Legislature in 1905. The first recorded ascent was made in 1858 by six men from Jacksonville, approaching from the northeast. The stone foundation of a former Forest Service fire lookout, which replaced an earlier wooden cabin destroyed by wind, remains at the summit.

Recommended Route

Mt. McLoughlin Trail #3716

The only established trail to the summit, Mt. McLoughlin Trail #3716 begins at the trailhead on Forest Road 3650 and climbs 5 miles one-way, gaining roughly 4,000 feet through three distinct terrain zones. The first 1.5 miles rise at a moderate grade through Shasta red fir and mountain hemlock, briefly joining the Pacific Crest Trail before branching west toward the peak. Above the PCT junction the trail steepens through boulder-strewn forest marked by blazed trees, thinning to an open viewpoint around 8,600 feet with a direct line of sight to the summit and Fourmile Lake to the northeast. Above treeline, cairns, white paint marks, and remnant Forest Service telephone poles trace the route along the east side of the ridge. The final push crosses blocky lava and loose sandy cinder, with occasional hand use helpful on the steeper boulder sections. The summit area has two high points: the stone lookout foundation sits on the first, the true summit a short distance beyond.

Other established routes include the Northeast Ridge approach and a winter route from the south, both considerably more difficult and rarely traveled.

From Medford, drive north on OR-62 for 5.6 miles to White City, then east on OR-140 for approximately 35.7 miles. Turn left onto Forest Road 3661 (Fourmile Lake Road) and follow it 2.4 miles, then turn left onto Forest Road 3650 and continue 0.25 miles to the trailhead. From Klamath Falls, drive west on US-140 approximately 35 miles, turn right onto FR-3661 for 2.4 miles, then left onto FR-3650. The FR-3661 approach is gravel and passable for standard vehicles; the direct FR-3650 approach from OR-140 is rougher and better suited to high-clearance vehicles. The parking area holds 15–20 vehicles with overflow along the road. Vault toilets and picnic tables are available on-site, but there is no potable water at the trailhead.

Key Landmarks

Pacific Crest Trail junction (early in the route, roughly 1–1.5 miles from the trailhead)
Fourmile Lake viewpoint (~8,600 ft; first clear view of the summit; primary navigation reference on descent)

warning

The Forest Service reports hikers becoming disoriented each year on the south-facing cinder slope, which draws parties off-route. Descending the sandy chute leads progressively farther from the trail; once below treeline on the south slope, recovering to the trail requires a roughly 2-mile traverse northeast through boulders. On descent, do not follow the south slope chute. Stay on or near the ridge, keep Fourmile Lake visible to the northeast, and follow the wooden posts, cairns, and white markers back to treeline.

Permits & Camping

Climbing Permits

No climbing permit is required for Mount McLoughlin. Forest Service Sky Lakes Wilderness information lists wilderness regulations but does not identify a day-use or overnight wilderness permit requirement; confirm current requirements with the High Cascades Ranger District before an overnight trip. Parking at the trailhead requires a Northwest Forest Pass, America the Beautiful pass, or a $5 day-use fee payable at the parking-area drop box. A voluntary climber's register is available at the trailhead.

Camping & Wilderness

Camping is not permitted at the Mt. McLoughlin Trailhead. The standard overnight staging area is Fourmile Lake Campground, accessible via Forest Roads 3661 and 3650. Sites are first-come, first-served; USFS lists standard single sites at $22–$25 per night, equestrian sites at $50, and additional vehicle and day-use fees at $10. Confirm current rates before arrival. The campground has vault toilets, hand pumps, and stock loading facilities, but USFS lists potable water as unavailable; bring drinking water or plan to treat it. Dispersed camping is permitted throughout the Sky Lakes Wilderness with no developed sites along the summit route; camp at least 100 feet from lakes and 50 feet from streams. Maximum group size is 8. Confirm current fire restrictions with the Fremont-Winema or Rogue River-Siskiyou National Forest before your trip.

Trailhead: N 42.376° W 122.313° (approximate; confirm before departure). Summit: N 42.4445° W 122.3158°. Elevation 9,495 ft; prominence 4,475 ft (ListsOfJohn). Key col 5,020 ft; line parent South Sister; isolation 71.76 mi. Sources: Rogue River-Siskiyou National Forest | Oregon Encyclopedia | ListsOfJohn | USGS

Wildlife & Seasonal Conditions

No ropes or technical gear are required on the standard summer route, but the upper ridge demands careful attention to cairns, white paint marks, and wooden posts, especially on descent. There is no reliable water above the trailhead; carry a full supply from the parking area. Loose volcanic rubble and sandy cinder on the upper ridge create poor footing, particularly on the way down. Severe mosquitoes below treeline from early July through mid-August make insect repellent worthwhile. Afternoon thunderstorms are possible on the exposed ridge in summer; start early and aim to clear treeline before storms build. June through September is the standard climbing window.