Pros:
- Extreme elevation change on many holes results in many exciting and challenging shots
- Many gorgeous views of mountains and downtown Vancouver throughout the round
- Multiple tees and two, 9-hole loops help accommodate different skill levels
- Good baskets and very nice, informative tee-signs
Cons:
- Thick brush both off and in the fairways can make finding even good drives difficult
- Most holes are either wide open or straight in front of you, rather limited line shaping required
- Benches (and trash cans) are missed on a course that easily takes 3 hours to play
- Gravel tee pads were usually fine, but some larger aggregate can result in dangerous footing
Other Thoughts:
Grouse Mountain is a great experience I would recommend to anyone visiting Vancouver. As others have mentioned, the cost of entry is not insignificant (around 45 CAD for basic adult admission) but you definitely get your money's worth if you plan on spending at least half a day on the mountain. My wife and I arrived around 9:15, and stayed until about 3:30, without spending any additional money on attractions not included with our $48 Peak experience ticket. The round took us about 3 hours, and the Birds in Motion show at the end of our day was a personal favorite.
Moving on to the course itself, this really is a unique experience compared to most disc golf courses, especially if you live in an area devoid of significant elevation. The views were great, and we frequently paused our round to admire the scenery and take pictures. This is a fairly rough course, however, and the low but thick brush present in many of the fairways can make finding even good drives a challenge, especially on the longer or blind holes. I definitely recommend using a spotter, we almost lost two discs even using a spotter, only finding them by dumb luck after giving up, and spent a lot of time looking throughout the round. Routing at least is fairly straight forward, and signs to the next tee are present near most baskets. Picking up a course map makes things even easier. We had the course almost entirely to ourselves, briefly encountering only three groups of hikers.
The equipment here is a bit of a mixed bag. The Discatcher baskets are good and the tee signs are among the best I've seen with a large number and name of the hole, clear depiction of the fairway, distance information for both "Pro" and "Family" tees, par, and a color coded difficulty rating which I found to be mostly accurate. The gravel tee pads are adequate, usually nice and level, but can still result in occasionally problematic footing. Benches and maybe an occasional trash can would be appreciated, this is a long course with a lot of hill climbing, and even for those in shape it will be tiring at some point mid round.
Elevation is naturally the star of the course design here. Almost all holes play either up or down hill, with many placed on precarious, sloped greens. Those with big arms will definitely be at an advantage on much of this course, especially on the back nine, but distance control and up-shot accuracy are equally important to avoid additional strokes. This course does lack a bit in the technical design department as far as line shaping is concerned. There are definitely places where you need to throw both left and right, but sharp doglegs and other more technical lines are not really present. I found I either had to throw a big hyzer, or a perfectly straight shot on most fairways. The front nine is less challenging though still a lot of fun, and the back nine will really test your skills and endurance. As a ~900 rated player I shot a 59, and my wife ~700 rated shot a 77 from the "Pro" tees.
A final note: as first time visitor, it took my wife and me almost half an hour to find the first tee pad. The start of course is not identified on the main park map with the list of attractions, which is not a top down view, and therefore hard to compare to the low resolution course map available online. While a woman at guest services in the Chalet gave us some general direction, it did not prove helpful enough, and the two additional park rangers we asked for direction did not even know there was a disc golf course. Of course we overlooked that you should check in and pick up a course map at "The Outpost" building, which I'm sure the rangers would know the location of well enough.
Grouse Mountain is a great course, if a bit rough around the edges, and the cost up to the Peak is well worth it if you plan on enjoying the other activities included with admission.