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Green Creek Circuit

Linkup including the Green Creek Arete, South Twin Sister, Jaws, Skookum Peak, Little Sister, and Cinderella Peaks.

Alpine Climbing Moderate

18 km
2.2 km
2.2 km
Low Point
619 m
High Point
2.1 km
Green Creek Circuit Map

This is a lovely linkup of 4th and low-5th class climbing on the incredibly grippy olivine rock of the Twin Sisters area. Variations are certainly possible but this includes some awesome scrambling/climbing.


The route is best completed in the early summer as snow covers some of the scree and water is easily available in most basins.

A 30m rope is useful for short pitches of climbing and one 15m rappel off Jaws. A small rack of cams, #.3-1 plus nuts with a few doubles in fingers is helpful. More rappels are necessary depending on comfort downclimbing 4th class terrain.

Another crux is crossing the Mmiddle fork of the Nooksack River right at the trailhead. Log crossings should be available within a few hundred meters of the trailhead.

More information available in the Cascade Rock Guidebook by Blake Herrington.



May involve slightly more complex glacier hikes, easy but possibly long rock ridges and steep snow up to 45 degrees. Equivalent to PD, PD+

Low Exposure

1 out of 4

The route is well protected or easy enough that protection is not required.


2 out of 4

Away from help but easily accessed.

Best time to visit

between June and July

Equipment required

  • Ice axe
  • Bivy Kit
  • Crampons
  • Quickdraws
  • Wires and Friends

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