Della Falls is a 18.3 mile lightly trafficked out and back trail located near Alberni-Clayoquot, British Columbia, Canada that features a lake and is rated as difficult. The trail is primarily used for hiking, trail running, camping, and backpacking and is best used from June until September.
Getting to the trailhead is a bit of a pain but the hike should include the trip to love lake on the opposite side of the valley.
First 10k is pretty easy, most of the elevation is towards the end. Highly recommend to take an extra day to do the Love Lake trail before the falls base camp. The views are well worth the 800m climb off a steep trail. Don't slip! :)