--Encourages fundamentals: It's necessary to be able to throw straight shots through gateways, both mando-forced ones and natural fairway ones. You also have to have a long distance hyzer and anhyzer shot in your bag. There are holes for rollers and there are holes for big arms. This course rewards the player with a variety of shots in his/her bag.
--Metro accessible: I live in the area and this is the only course that's truly metro accessible. It's just a 10 minute walk from the College Park metro stop on the green line.
--Bi-weekly doubles: There's doubles on Sunday morning and there's doubles Tuesday evening (but I suspect that's on hiatus during the winter).
--Friendly people: There are a lot of regulars that play the course so it's easy to make friends if you don't know the course or if you're looking for a disc.
--Shady: Lots of trees make a round a refreshing walk rather than a death march. Then again, I'm used to playing in the desert of eastern Washington (State).
Multiple teepads: Every teepad offers a very different look at the hole. Reds are shorter, but there are still a few doozies in the set. Blues are the longest and require some of the harder shots making the course a tough par. The alternate tees make it easy for varying skill levels to play together.

--Swampy: There's not much drainage at all on this course. Make sure you bring a towel or two with you. The dew takes a long time to evaporate in the morning because of all the shade. You may even consider bringing a second pair of socks in case your disc finds a particularly nasty area and you have to go in after it.
--ticks: They're out there. I play the course ~2 times a week and I always check myself afterwards. Once found one on my stomach after a round.
--Disc golf density: because it's so accessible, sometimes there are a lot of people on the course. They don't always know the game very well and may walk across your fairway without realizing it.
--No elevation changes
--Can be a little tricky to navigate because of how tight the holes are.

I play this course ~2/week and even though it's the only course I can easily access because I don't have a car, I'd still play it often.

Nice mix of wooded holes, about half straight tunnel shots, the other half evenly split between right and left benders. Course is well groomed, no scrub or undergrowth to hide your discs. There is a creek on one side of the property but you have to yank it pretty hard to find it. Course area is pretty much dedicated to disc golf so there are few pedestrians to deal with. Concrete tees are great imporovement from the old blacktop this course used to have. Three tees per hole, I've yet to play the blues.

Course is short, Lots of mid-200 footers is the order of the day here, with only 2 holes over 300. Terrain is flat as a pancake so no elevation related challenges.

Nice course on a relatively small plot of land, it truly is a great course to introduce new players to the game. Enough obstacles to not be boring, but open enough to not be overly frustrating for newbies.

The old course was updated number of years ago (about 2000?) and stretched about as far as this plot of land can handle. New concrete tees were added and modern baskets placed to replace the old Mach I's, I believe Dave Devine had a big hand in this (thanks Dave).

When the wind's blowing in the right direction it seems like planes are trying to land in the parking lot, can be quite a surprise the first time you see it..

This course earns many points for being the only 18 hole course inside the D.C. Beltway. That said, it's hard to write a review for a course like this, because many of the features that make it great for beginners or for practice rounds make it mediocre for competitive play... so I'm going to put most of the course description and playing information in the "Other Thoughts" category and use the pros/cons for very basic information... so skip down for the thorough review.

But in brief, the pros:

Decent concrete tees on every hole
Multiple tees on many holes; where present, the white/blue tees add difficulty and give the course a higher replay value.
Large, beautiful trees provide great shade in summer.
Very little underbrush.
Good parking, and convenient location inside the Beltway.
Amusing course and highly playable year round.
Friendly locals and a decent club host several tourneys every year and often try new/different formats for fun.

Doesn't drain as well as some courses, so it can get mucky in places after the rain.
Fairways are close to one another without a lot of tree protection, so watch out for flying discs.
Shot variety is weak -- many holes give you that "deja vu" feeling.
Almost zero elevation change.

I would rate this as an above average red/beginner level course, but it's not so great for other level players. Though it is a very good place for more experienced players to practice new discs and throws with minimal consequences... ideal for practice rounds with mids/putters.

The tall, beautiful trees that provide 95 percent of the obstacles here have very few low branches, so there is very little in the way on most holes. The trees do force some minimal line-shaping, but because of the lack of low branches, there is a high-ceiling available on almost every shot, and even when you hit a tree, there is seldom any significant penalty for it -- you just have an open 2nd shot toward the basket.

Most holes have half-a-dozen different lines to reach the basket, and most of the distances are in the 180-300' range. So there is not a lot of variety on the holes, unless you choose to FORCE some variety by trying different lines every time and trying different discs, different routes, different types of throws. In this sense, this course can be great for practicing your game -- it's just a very poor course for competitive rounds...

Based on PDGA tourney results, scratch golf (1000-rated) is in the 40s for every layout, even the hardest tees. From the red tees, 1000-rated golf requires shooting -12 or better (42 strokes for the round), which just isn't an ideal tournament venue.

Bottom line, the short, open holes and the lack of OB/bushes/thick-trees/elevation/etc... to penalize errant shots makes this ideal for beginners and practice rounds but weak for any sort of competitive play.

Good tee pads, easy to follow, benches, plenty of shade in the summer, alternate pins and tee pads. Enough trees to keep you honest, and a nice selection righty/lefty/straight shots that teach solid fundamentals. Park is well maintained and an easy stroll for beginners. Kiosk with a map shows location and directions for most of the local courses. Note: The tee signs are the originals dating back to 1980 with Par 4s and Par 5s suitable for beginners only.

Can flood after rains, short by today's standards. The loss of many, many trees over the years has made it much easier.

My first basket course back in 1984 and still one of my favorites, even though it is primarily a recreational course by today's standards. If the course is empty try playing The Nines...tee of 1 to basket of 10, tee of 11 to basket of 2, etc. Makes for an 8000 foot layout where 54 is tough for top players. Maximizes criss-cross, so course must be deserted.

Three tees per hole. Concrete tee pads. Multiple pin positions. Distance/flight path info at each red tee pad. Arrow at each basket indicating next tee area. Mandos. Minimal chance of losing a disc

Flat terrain/similar sized trees throughout make it difficult to provide much variety.

Blue/White tees same 8 of 18 holes. No very long holes. Course plays much more difficult from the blue/whites than the reds. Excellent use of a minimal amount fo space. Need to hyze, anhyze, and S-shape many shots.

Great course for beginners, but still challenging enough for more experienced players.

Compact course is easy to play for a quick round. Short holes and low difficulty level make it a good beginner course. Lack of vegetation makes it almost impossibe to lose a disc.

The layout makes these 18 holes somewhat monotonous. All holes are flat and open aside from some large trees scattered around.

This course is so open and lacking in small brush that you can see the entire course from just about anywhere on the course. For a small park in a dense suburban area, Calvert Rd packs in pretty good disc golf experience, but for top notch disc golf, you need to get farther away from DC.

Smartest use of 4 acres you'll ever see. Lots of gorgeous trees. Well maintained, grass is always cut and rollers scream. Excellent tee pads. Great volunteers that help maintain course and move baskets a lot.

No elevation. Course below street level and holds water. Fairways are up against each other. Easy to get hit by a disc here.

I learned how to play disc golf at Calvert in 1988. I bought my first 2 golf discs, a DGA PowerDrive and SuperDrive here. Back then, the place had Mach 1s that were literally falling apart. The old tee pads were junk! Dave Devine got the money to face lift Calvert in the 90s and it's never been the same since (thanks Dave!). One of the best 4-acre courses anywhere. Great baskets, multiple concrete tee pads, benches. But alas, even with all the amenities, it's still dead flat and only 4-acres. A two-some can finish a round in under an hour.