McKenzie Pass / Old McKenzie Highway (OR-242)

OR-242 winds from McKenzie Bridge to Sisters over a 5,325-foot summit through a dramatic 2,000-year-old lava field on a narrow historic road open only from mid-June through mid-November.

The road between McKenzie Bridge and Sisters doesn't look like much on a map — a thin line crossing the Cascades at 5,325 feet — but it carries more history and geology than most routes twice its length. OR-242 follows the path of an 1860s wagon route, and in several stretches the road feels like it hasn't been rethought much since. That's part of the draw.

From McKenzie Bridge, the western approach climbs steadily through old-growth Douglas fir before the trees thin and the lava starts. The Belknap lava fields are roughly 2,000 years old and still look raw — fractured black basalt spreading in every direction, punctuated by cinder cones and the occasional wind-bent pine that somehow found a roothold. There's nothing else in Oregon quite like it at road level. Near Windy Point, the views open to the east toward Sisters and the high desert, a sharp contrast to the green valley you left an hour earlier.

The road itself demands attention. It's narrow throughout, with tight corners and limited sight lines in sections. Vehicles longer than 35 feet are prohibited, which gives you a sense of the geometry involved. Loose gravel collects on the edges and in shaded corners, especially earlier in the season. The summit area can hold cold temperatures and afternoon wind even in summer. Riders who carry speed into blind curves here tend to run out of pavement quickly.

Alder Springs Campground, around mile 10, is the main stopping point on the western side if you need to regroup or take a break before the climb begins in earnest. Services are minimal on the pass itself — fuel up in McKenzie Bridge or Sisters depending on your direction of travel.

Before you go: OR-242 closes with the first significant snowfall each fall, typically mid-November, and does not reopen until the third Monday in June at the earliest — often later depending on snowpack. Check current road status before planning a trip, especially in June or October. Cell service is unreliable through most of the route. The road is open to vehicles up to 35 feet; trailers and large rigs are prohibited. Because the road is narrow and the shoulders are often lava rock or drop-offs, tire placement matters more than on a typical mountain pass.

The lava field is the thing. For several miles near the summit, the road cuts through a 2,000-year-old basalt flow — black, raw, and treeless — that makes the Cascades feel genuinely alien. The Dee Wright Observatory sits at the 5,325-foot pass and is worth a stop; on a clear day you can pick out a half-dozen volcanic peaks by name.

The road itself is narrow and historically significant — it predates the modern highway system and was never rebuilt to current standards, which shows in the pavement. Turns are tight and uneven in places, some with deteriorating edges. The surface can be gritty with windblown debris, especially after the road first opens for the season. Traffic is lighter than on US-20 to the north, but you will encounter RVs and cyclists, particularly on summer weekends.

The west approach from McKenzie Bridge climbs through old-growth Douglas fir before the tree cover drops away entirely near the summit. The east side descends into high desert terrain toward Sisters, which changes the character of the ride significantly — you get two distinct landscapes in one crossing. Most riders find the west side more technical; the east side opens up but watch for sand drifting across the road where the lava field gives way to pumice soil.

Wildlife crossings are common, particularly deer at low light. The summit area can hold afternoon thunderstorms through July and August with little warning.

Before you go: OR-242 is typically closed from mid-November through mid-June due to snow, and the opening date shifts year to year — check ODOT before planning around it. There is no fuel on the road itself; fill up in McKenzie Bridge or Sisters. Cell coverage is unreliable for most of the route.

// Why this road