No bed, latrine, or scat found in the nearby vicinity.
Sheared fur, entered cavity through ribcage behind front shoulder.
Fed on organs and hind leg first.

Timeline:
0730: attacks coyote
0900: coyote hauled to densely forested area, hair is sheared, no entry or disarticulation yet
1700: at least one hind leg gone and some internal organs consumed
2018: returns to feeding site
1700 the following day: Consumed (or at least removed) everything but front forelegs, skin, tail, intestines, and head.

This is not my photo. I did not have a camera when we were walking along North Lake Whatcom Trail. A neighbor later sent this to me.

Why the mountain lion was swimming in the lake in broad daylight is a mystery. It does look pretty young though.

Plants numerous, but scattered. Growing in sand, silt, and gravel in 0.5 to 1 meter of water.
Leaves 6-10 cm in length.
Megaspores 450--550 μm in diamemter; uniformly echinate, spines thin and sharp, not reduced near the equator; girdle obscure.
Ligule conspicuous, deltoid, >1 mm long.

Note: Isoetes echinospora was previously recorded at Lake Padden by legendary botanist/plant collector Wilhelm Suksdorf in 1890.