These are all the mammals I have confirmed sightings of since 2009. I have bolded especially interesting species.
52. Sea Otter.
51. Prong-horn Antelope
50. North American Porcupine
49. Wild Horse
48. Mountain Goat
47. Bison
46. Grey Wolf
45. Wolverine
44. Long-tailed Weasel
43. Hoary Marmot
42. Pika
41. Striped Skunk
40. Golden-mantled Ground Squirrel
39. Lynx
38. Eastern Cottontail
37. Eastern Chipmunk
36. Thirteen Lined Ground Squirrel
35. Richardson’s Ground Squirrel
34. Harbour Porpoise
33. California Sea Lion
32. Stellar Sea Lion
31. Harbour Seal
30. Hump-backed Whale
29. Orca
28. Raccoon
27. Water Rat
26. Moose
25. Little Brown Bat
24. Snowshoe Hare
23. Red Fox
22. Field Mouse
21. Beaver
20. Least Shrew
19. Muskrat
18. River Otter
17. House Mouse
16. Red-backed Vole
15. Meadow Vole
14. Bobcat
13. Grizzly Bear
12. Black Bear
11. Pine Marten
10. Elk
9. Groundhog
8. Least Weasel
7. White-tailed Deer
6. Mule Deer
5. Big-horned Sheep
4. Coyote
3. Feral Rabbit
2. Eastern Grey Squirrel
1. Red Squirrel