Pros:
1) The use of that available land is quite good with the very steep hills along the Vermillion River coming into play on several holes and providing for some punishing rough if you find yourself in it. There's not much wooded area on the course, but what's there is used well where possible. There are a mix of tunnel shots, short technical shots, and open park style holes along varied terrain. The open holes employ the use of tall grass/over OB (not thick enough to lose a disc in) and walking paths play OB on all holes except 3 and 5. There are also a couple mandos around the course, but they don't really come into play unless you really shank one.
2) The course is well balanced between left, right, and straight shots. Every hole is unique from the others on the course and nothing feels repetitive. Though, if you are a player who throws under 300 feet the string of open par 4s towards the end could get boring and be a slog to get through.
3) On the back of the previous point, the hole design here is generally above average. Hole 1 starts you off on one of the hardest shots on the course, a good shot will almost always give you a birdie look but you won't get anywhere close to tap in range without something spectacular. Great par 3. The short par 4s are both very tight and require very accurate placement shots off the tee to even hope to have a look at a 3. The open par 4s are all pretty straight forward, but still a good time, with the exception of 15 which is a maximum tweener hole where a 2 is nearly impossible and 4 almost always feels bad. Holes 14 and 16 use the moderately sized hill to great effect. 14 plays down it and is an extremely fun bomber hole, players with top pro level power (500-550ft+) may even be able to get looks at eagle. Hole 16 plays back up it and the steepest section sits right in the sweet spot for many people's max distance, getting to the top and having clean footing takes, minimum, 400ft+ of power. But, laying off to just shy of 300 feet and landing on the flat area below the slope leaves you a deceiving and tricky uphill approach towards the basket. For only being 550ft, it's a tough birdie. If there was one hole that would be called the 'signature hole', though, it would probably be hole 11. It off a small cliff, easily a 50-foot drop in elevation, down into the river valley but it is extremely short making distance control very difficult. There isn't exactly a clean line to get to the basket, so it's not the greatest hole, but it is certainly unique.
4) There are stairs built in various places around the course with steep slopes to help get around. They are a little wonky at places, but nothing dangerous. The one place that should have stairs that doesn't (hole 12) does have a rope tethered to a tree on the right side of the fairway to help you up the hill, if you need it. Along the same lines, there are a couple built up greens with retaining walls on steep hill sides (3 and 12) and a structure on 18 that holds a slightly elevated basket.
5) There is usually a port-a-potty on site on the walking path between 8s basket and 10s tee and it is kept relatively clean and emptied regularly. I do believe it is removed over the winter months, as it is not there currently. If it doesn't come back in the spring I will update my review.
Cons:
1) Let's get the worst one out of the way first. Navigation is remarkably terrible, and signage is very limited. Do not show up here without UDisc or some kind of map of the layout. Note, the map in links and files is not completely accurate. The first time I played here I accidentally skipped a couple holes and spent a good 10 minutes going back and trying to find them. The remnants of the extinct layout of the course definitely don't help either as there are just random disused tee pads scattered around the course, the one between holes 13 and 14 is specifically confusing as it is directed straight towards hole 16s basket. I see people lost between holes here way more often than any other course I frequent. Even after learning the layout it just doesn't flow well in places, specifically the need to back track on every hole from 5 thru 10 to get to the next tee.
2) A few holes play very close to each other, specifically holes 3 and 15 almost share a fairway but go in opposite directions. The other open holes play close to each other and you can find yourself OB in an adjacent fairway, but they aren't nearly as bad as the interaction with 3 and 15. But, either way, if the course is busy keep an eye out just in case.
3) There are two sets of tees on most holes, which is nice. But, in some cases they don't really make the holes any easier. And, in most cases they are just the same shot but shorter and don't really add anything meaningful to the course. If you are near the 850 range rating wise or above don't even bother with them. Though, it is worth noting, during the winter the short tees are usually the only tees that get cleared regularly on most holes once there is snow cover.
4) Speaking of tees and tee signs, they leave a bit to be desired. The tees are generally fine, usually plenty large and always grippy when dry, but a few of them have developed large cracks and are serious tripping hazards if you drag your feet at all. I've nearly taken a spill on 16s tee a couple times in the middle of my run up. Hole 12s tee is also extremely eroded on the backside and can limit your runup depending on the route you take on the hole. The short tees are very hit and miss. Sometimes they are big, sometimes they are small, and on hole 9 the short tee points in literally the completely wrong direction. The tee signs...exist. That's about it, though. The have hole number, some questionable hole distances, and nothing else. No par or even basic hole maps. This can cause first timers frustration as when the leaves are on the trees almost half the baskets aren't visible from the tee. The short tees have no tee signs, just small wooden stakes in the ground next to them.
5) The walking paths around the park are very much in play on many holes. Paying attention and giving way to walkers/bikers avoids most issues, but the paths can be quite busy at times and some holes (6,7, 8, and sometimes 17) it's not always possible to see if people are coming. I've never seen any close calls between people on the paths and discs, but it wouldn't surprise me to see someone hit.
6) During the spring and after heavy rain there are a few places on the course that will hold water. Specifically, the right side of the fairway on hole one can get very deep, and it's a place that discs tend to end up if they miss the gap and kick off the patch of trees in the middle of the hole. The short tee pad on hole 7 tends to end up completely under water every spring when the snow melts. Additionally, not a con, but on topic, the holes near the river (5 and 11) also bring water into play on shanks or bad kicks during the spring time. The rest of the year the water is usually low enough to never be in play.
Other Thoughts:
Overall C.P. Adams is a slightly above average disc golf course. The list of cons make me want to rate 2.5, but the hole design and the actual disc golf here is 3.25-3.5 worthy, so I'm meeting in the middle for a 3.0. For the low-mid level amateur player this course offers a good challenge as even par plays almost exactly 900 rated but for higher level ams and pros will be playing birdie or die on over half of the holes here. This course is also generally not very busy, even during great weather, due to its location just outside of the Twin Cities metro area. I've only seen the course at a level I'd call 'busy' handful of times in the last two years. If you are in the south/east metro and looking for a less busy course, or just want to try something new, I'd recommend making the trip out and playing. If you are in the north/west metro or an out of towner I'd say pass on this course and play one of the higher rated courses in the metro proper, unless you are looking to bag as many courses as possible. It's not a bad course by any means, but there are at least 10 other courses in the metro that are equal to, or better, than it.