Looks very cool, how far in? ok hike for kids (age 5)?
It's 6 miles in and about 3400' elevation gain, I would not recommend taking a 5 yo. Between that and the 100+ blow-down, it would likely discourage the child from ever wanting to hike again. You may look at Crater Lake in the Sawtooths, its only about 4 miles and about 2100 elevation.