This is a great hike for kids, one I picked specifically for CK and Pete and their two kids (ages 6 and 8), who had never seen Mt. St. Helen's. Highlights are a bird's eye view of the mountain and the breach, volcano-blasted hillsides, log-jammed Spirit Lake, and lovely little Harmony Falls, where the kids were amazed to learn through a makeshift science experiment that large lava rocks actually float on the water.
The trail descends gradually through welcome shade for the first 0.5 mile, then heads onto a sun-exposed plain. The grade, for a child, would feel moderately steep. Log-hop across some huge grey logs and enjoy Harmony Falls, then wander down towards Spirit Lake, where some flat rocky ledges provide ample space for a picnic or a nap.
Wildflowers are in bloom, especially brilliant red paintbrush, purple penstemon, and pearly everlasting. Flowers were far fewer than up above on the Independence Pass Loop, but there was a smattering of lupine, sitka valerian, bleeding heart, and arnica.
Flies weren't bad, as there was a nice gentle breeze blowing.
We were joined at the falls by a family hiking with a yellow lab, apparently either unaware of, or unconcerned about, the "No dogs allowed" regulations in the National Monument. Please obey the rules.
STATS:
Total time: 2.5 hours (including lolly-gagging, snacking, and science experiments)
Distance: 2 miles round-trip
Elevation Gain: 700 feet (on the return)
Map: Green Trails No. 332 (Spirit Lake)
Permits: NW Forest Pass
TO GET THERE:
From Randle, take FR 25 to its junction with FR 99.
Turn right onto FR 99 and drive 13 miles to the trailhead on the right (3 miles past junction with FR 26).