The trailhead is the Grotto Shuttle stop in the main Zion canyon. During summer months, the Zion shuttle is the only way to access the trailhead.

Approach (45 for lower, 60-90 minutes for upper)
From the trailhead cross the bridge over the Virgin River, and turn right toward the signed Scout Lookout/Angels Landing. The trail begins climbing and makes a few switchbacks before entering Refrigerator Canyon. The cool shade of Refrigerator Canyon is a great respite from the heat in the summer. If doing Lower Refrigerator only, stop at the bridge crossing over Refrigerator Canyon and head down Refrigerator Canyon from there.

Upper
Continue along the Angel's Landing/West Rim trail. A few minute up Refrigerator Canyon, the trail begins climbing again up the right side, soon entering Walter's Wiggles. The Wiggles are a unique section of 21 switchbacks. Zig-Zag up them, reaching Scout Lookout. There is a toilet available at Scout Lookout, but no water.

Continue left on the West Rim trail. It climbs a bit more and passes the head of Refrigerator Canyon at a slickrock section. This is very obvious, and the canyon starts as a narrow-ish steep dirt and brushy chute.

Descent - Upper Section
Head down the steep dirt and brush gully. It is generally easy to meander down, with a lot of old debris (presumably from the West Rim Trail construction). Numerous short drops in here are easy to downclimb if you look around. The canyon narrows at the obvious first rappel.

R 1 - About 10 m ( 33 ft. )

Just down from rappel 1, a large boulder splits the watercourse at the second rappel.

R2 - 13 m ( 43 ft. ) - Walk a precarious slope on the right to a tree and anchor for the second rappel. This is easy enough, but do watch your step.

Below the second rappel the canyon continues to drop steeply before leveling out. There are no major obstacles to the bridge over Refrigerator and start of the lower section.

Descent - Lower Section
Walk under the bridge and head down canyon. A few downclimbs quickly present themselves. Beginners may want a rope.

Rappel 1 - 10 m ( 33 ft. ) to an avoidable pool.

Rappel 2 - 35 m ( 115 ft. ) to a small ledge and the anchor for rappel 3.

Rappel 3 - 58 m ( 191 ft. ), with the last section being free hanging.

Exit
From the bottom of the last rappel, work down the stream course. Once through the boulders that make up this section, look for an open area on the right. Follow a path to it, continuing across the open area, two small drainages, and onto the West Rim trail.