Della Falls is a 10 mile out and back trail located near Alberni-Clayoquot, BC that features a waterfall and is rated as moderate. The trail is primarily used for hiking and is accessible 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! :)