Index, Washington

Index is a tiny town in the Cascade foothills northeast of Seattle, beneath the compact granite cliffs known as the Index Town Wall. Despite its small size, it holds some of the finest crack climbing in the Pacific Northwest.

The rock is superb granite, clean, steep, and split by parallel-sided cracks that make it a mecca for traditional climbers. The Lower Town Wall offers steep single-pitch trad and mixed lines, while the Upper Wall gives longer multi-pitch adventures. Grades run from moderate 5.8 and 5.9 crack classics through a dense concentration of hard 5.10, 5.11, and 5.12 testpieces, with some of the most respected finger and hand cracks in the country. There is sport climbing too, but Index is defined by its immaculate gear routes.

Practical detail: the walls rise directly above the town and the Skykomish River, with parking and short approaches of just a few minutes. Access is managed by a climbers' land trust that purchased the Lower Wall to keep it open. Camping is available nearby, and Seattle is roughly an hour and a half away.

Season and character: the maritime Cascades are wet much of the year, so the climbing window centres on the drier months, roughly June to September, with the steep walls sometimes staying dry through light rain. Because the granite sits in forest above a river, the setting is lush and green, mossy at the edges but clean on the popular lines. Index rewards climbers who love precise crack technique, offering a concentrated, world-class collection of routes in a mossy river canyon overshadowed by bigger Cascade summits.