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Greenhorn Summit: Highway 155, Greenhorn Mountains, California
Photo: Kvpics · CC BY-SA 4.0 · cropped

Drives California The Southern Sierra

Greenhorn Summit: Highway 155

CA 155, Evans Road · Glennville → Wofford Heights

Intense20 mi35 min3,600 ft climbHigh point ≈ 6,100 ftOne way
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The drive

Highway 155 crosses the Greenhorn Mountains between the ranch town of Glennville and the Kern River Valley. From Glennville the road, signed Evans Road, climbs east through oak and then pine on a very winding, steep line that follows the contours of the slopes, to Greenhorn Summit at 6,102 feet, by Greenhorn Mountain County Park.

Over the top it drops through the small mountain community of Alta Sierra and twists down the east face of the range to Wofford Heights, on the shore of Lake Isabella, ending just short of Wofford Heights Boulevard. The descent loses close to 3,500 feet. From Wofford Heights, Highway 155 follows the lake's west shore south to Lake Isabella town and Highway 178, the way back to Bakersfield through the Kern River Canyon.

Along the way

  1. Glennville
  2. Greenhorn Summit
  3. Wofford Heights
Elevation
3,600 ft of climbing · high point ≈ 6,100 ft
GlennvilleWofford Heights
Curves
Twisty most of the way
GlennvilleWofford Heights
GentleHairpins

Good to know

  • It's very winding and steep on both sides of the summit: use lower gears on the long descent to the lake.
  • Chains may be required in winter snow and storms.

Open all year, weather permitting. Roads close for snow, fire, storms and repairs: before you set off, check Caltrans: Highway 155 conditions.

Questions about this drive

How long does Highway 155 over Greenhorn Summit take?

Highway 155 from Glennville over Greenhorn Summit to Wofford Heights is 20.1 miles and takes about 35 minutes.

How high is Greenhorn Summit on Highway 155?

Greenhorn Summit, the high point of Highway 155, is 6,102 feet.

Is Highway 155 open in winter?

Highway 155 over Greenhorn Summit is a state highway, but chains may be required in winter snow; check Caltrans before going.

Is Highway 155 twisty?

Yes. Highway 155 is twisty most of the way between Glennville and Wofford Heights, with steep grades on both sides of Greenhorn Summit.

What you get in the app

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Distance, time, elevation, curves and intensity are from Carve's route. Checked 2026-10-28.

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Map of Greenhorn Summit: Highway 155, from Glennville to Wofford Heights