Lupin flowers bloom above Mist Park, along Spray Park–Knapsack Pass Loop, Mount Rainier NP, Washington, USA.

Lupin flowers bloom at the headwaters of Cataract Creek in Mist Park, along the Spray Park–Knapsack Pass Loop, in Mount Rainier National Park, Washington, USA. Caution: the unmaintained and unmarked Knapsack Pass trail exposes experienced hikers to slippery scree and steep snow (possibly icy), best hiked in late summer using a good GPS device, map, and trekking poles.