I'll get the pros out of the way first, I'm glad something was done with this park to improve it and make use of the space. The course holes are spaced far apart so there's no risk of interfering with players on other holes. Because it is not a popular course, it will also not be crowded. There are some fun holes like 10 that goes downhill over a ravine too.

I live very close to it, but I don't go here, because when I tried, I found a course that's not maintained at all. There's very few signs or markers, usually no real teepad to speak of, and honestly, if I didn't have UDisc's map of the course, I could have never found most holes. The design suffers from a lack of upkeep, as there is overgrowth and small trees in the way on most holes.

I see a lot of people saying its a hard course meant for Pros, but I disagree. Its hard, sure, but only due to poor design and upkeep, as some holes don't even have a fairway, just throw into the woods and hope you don't hit anything. There are a few nice holes scattered about, but the overall experience has been disappointing every time I've tried to play here, and my friends that have been here have had the same impression.

There are plenty of better and more maintained courses within arm's reach in DE, I've been quite happy not returning here. Least favorite disc golf course in DE.

Greenridge is a long, difficult course set around the edges of a creek and public park. It comes with surprising elevation changes, a good mix of open and wooded holes, and a mix of distances up to 650.
It is underrated and underplayed for northern DE.
It tends to be deserted in the summer as the heat and long walk can take 2 hours to complete. Bring water!
Hole nine ends near hole 3 for the shortest walk back to parking, 10-18 then progress out and back.
Some of the navigation can be confusing at first but look for the painted rocks (especially between 3 and 4, a long walk past the basketball court). The course has been beaten in more in the last 3 years and navigation has improved considerably.
Course is one of the free courses in northern DE.
Single set of tees (except 9) ensures advanced play only. Don't bring beginners unless you enjoy wandering through the woods looking for discs that kick high.

The wooded holes in the front nine (4, 5, 8, and 9) have punishingly narrow fairways with random trees in the fairway. Some feel more like luck-based than skill-based shots for intermediate players. 17 has a narrow 15' fairway, but no trees randomly in the center.
Very few benches.
Rubber mat tees are lumpy and somewhat uneven, but not unplayably so.
In the green months, the rough is unforgiving. Large bushes with spikes, vines with spikes, leaves to bury a disc (especially those skip shots that slide down the hills at the end), and did I mention the spiny plants everywhere?
No practice basket, but if no one is playing 18, the pin is very close to the parking lot.

This course is a lot of fun to play but is intermediate to advanced only. If you are a beginner, you will be frustrated. I was very frustrated the first two times I played here, and now I usually return to test my skill development.

The main parking lot is at hole 1, but there is additional street parking off Tamara Circle next to tee 6, between 3 and 4, and near tees 11 and 12.

The course map (listed as preliminary in 2016) on the site lists multiple pin positions, but in three years I've never seen them move and only seen the posthole for 12. There are multiple tees marked on the map but currently the only hole with two tees is 9, and it is not on the map. I think someone decided 620' of hitting trees was too much and put in a more reasonable 300-400' dirt tee.

Hole breakdown:

Hole 1: A 310' par 3. Plays across an open field which is usually well kept. The walk from the parking lot to the tee is very short but the tee is far enough from the playground to ensure no interference.
Hole 2: A 543' par 3. Tucked slightly back into the woodline, plays out and across a 500' field with large, mature trees scattered throughout. Low lines to the right or left are key to par here.
Hole 3: A 260' par 3 with 45' of ascent. Follow the direction of the prior play under the railroad bridge, the tee is on an elevated rise to the left. A 300' uphill hole with a sharp vertical drop punishes shots that don't make it all the way to the landing zone with a difficult uphill shot after your disc rolls to the bottom of the hill. There is a more gradual path to follow to the green around the left, or you can attempt the 60-degree hill if it is dry.
Hole 4: A 570' par 3. Follow the painted rock to the left, past the basketball course, through the woods a little, then across another field into the woods. The tee plays from in the woods out across a field, left of a mando (too many errant discs in the neighborhood), then around some more woods. Head into the woods for…
Hole 5: A 510' par 4 that vaguely moves to the right. The rough off the left of the fairway is awful in the summer and the downslope pulls discs away from the fairway quickly. Follow the path past the basket to…
Hole 6: A 280' par 3 that plays slightly downhill across a creek. The basket is perched two feet from a 10' drop which can roll into the creek, so placement is key. This one is a great looking hole and high on the fun factor. There is no bridge across the creek, so you can either head downstream to the basket to step across the rocks, or cross using the downed tree closer to the tee. Cross back over the creek and follow the path to the right and around the large tree to…
Hole 7: A challenging 270' par 3. A small dogleg right at the end from the clear part of the fairway hides the basket from sight off the tee without looking for it. The steep right-to-left slope of the hill severely punishes shots that don't land on the ~15 green, but the pin is much closer to the right side and missing long will result in a long rollaway. There is a staircase for those who choose the lower right route or who miss long on the left route. Continue up the hill to…
Hole 8: A 360' par 3 for RHBH. Again, the fairway plays along the top of the drop to the creek, so shots that don't land in the fairway will continue downhill into the trees. Walk ahead past the basket to…
Hole 9: A 620' par 4 through the heavily wooded fairway, sloping right to left down again. The hole finishes with most of the 25' of elevation gain centered around the pin. Don't give up after this hole, because it gets better. Walk past the basket for 3 and follow the rocks with white arrows to…
Hole 10: A 430' par 3 downhill cliff shot. It plays across a small creek to a lovely green without obstructions besides a young sapling nearby. Continue past the basket to…
Hole 11: A 660' par 4. Playing along the treeline, this hole allows you to air out the big arms but will hurt your scores if you get pulled into the woods with too much RHBH hyzer. Walk past the basket and playground to the far side of the field for…
Hole 12: A 460' par 3. Primarily across the open field, the rough on the left is a nasty place to lose a disc. Several large mature trees provide minimal obstacles around the pin. I haven't seen the pin move in 3 years, but there is a posthole for a second position. Follow the path to the right to…
Hole 13: A 330' par 3. A shorter hole with a right and left route around the center trees and various obstacles. Proceed to the left towards:
Hole 14: A 230' par 3 ace run with a fairly open fairway and a clean shot at the basket. Take a longer walk to the right and then backtrack up the fairway to the tee of…
Hole 15: A 440' par 3. A long straightaway followed by a gentle curve left along a creek. 13, 14, and 15 can be muddy when it rains but 15 is the worst offender. There are a variety of stepping objects (pallets, stones, and walk paths) but this hole is a mess when it has rained. Cross the bridge to…
Hole 16: A 580' par 3 to air out your drivers. There is a large clump of bushes and trees forcing a left or right line, and the basket is tucked in a stand of trees with high branches. Also can be quite wet with casual water when it rains. Continue through the field past the basket and across the bridge to…
Hole 17: A 280' par 3 tunnel shot. A fairly wide fairway ends at a basket up on 6' of rocks with a tree growing out the back of the mound. The creek to the right is OB but there are enough trees to keep a disc from disappearing. Walk past the basket, under the railroad bridge, and the next tee is on the left - look for the painted rocks.
Hole 18: A 390' par 3 that plays out of the woods across a creek into the open field next to 2. A good tee look for a final hole, but the wide open field leaves you feeling a tad deflated if you miss a putt. Occasionally people will be warming up with the practice basket which is irritating.

Final thoughts: Worth stopping for, especially over some of the more popular park courses nearby. The variety of distances, elevation, and slopes give the course a lot of replay value and a big fun factor that keeps me returning regularly.

+ Most baskets have 'NEXT' arrows attached to them guiding players towards either the next tee or the path that will bring players there. There are reinforcing arrows during longer walks.
+ The whole course plays within a peaceful neighborhood park with nice fields, fun woodsy trails and some gentle waterways. As I played, I loved to occasionally stop and just enjoy the quiet.
+ Benches at most tees give players a place to chill for a bit.
+ There is a nice balance between open, wooded and hybrid holes at this course with some rare but appreciated elevation.
+ The tee signs are large rocks on the ground with hand-painted illustrations and distances, but...

- ...sometimes those illustrations can be ambiguous, unclear, vague and/or faded. I liked their natural touch, but they didn't do the trick most of the time. At some moments they only confused me such as at holes 4, 9 and 13 to name a few.
- The tee pads, while long enough for my long-legged wind ups, are mostly simple carpet or turf anchored to the ground, which can be slippery at best or bumpy and unreliable at worst, depending on the ground below it. A player could roll and ankle.
- There is no warm-up area or lost disc box that I could see. A course like this could benefit from one because the leaves and undergrowth in the rough can be pretty dense.
- Some safety issues.

It seems kind of strange that a disc golf course that's been around since 2016, according to its info page, shouldn't have any reviews yet. I find it difficult to believe that I am truly the first person to review this course. Have previous reviews been deleted?

In any case, my favorite hole here to look at is hole3 because of its stark uphill sight. The two holes before that are kind of ho-hum and perfectly flat. After taking a stroll beneath a bridge with some interesting graffiti on it, I turned a corner and felt struck by the sudden presence of a mighty hill with some trees and a disc golf basket near the top of it.
My favorite hole here to play was hole 10. I've still got a soft spot for downhill tee-offs, and that one was a particular joy to play because it has trees to avoid as well as a stream to fly over during its long descent to the ground.
My least favorite hole is 9, and anyone who has played here can surely understand why. There are so few other courses I've played with a tree tunnel quite that long, straight and narrow! (Can I really complain, though, since I managed a bogey on my first try?)

Anyway, Greenridge as a whole is a nice course. It's got a little bit of everything. The elevation, the waterways, the wide open fields and the forested areas aren't the main focus by themselves, but they're all here in varying combinations. To be honest, I'm not sure which kind of player would enjoy this course more because it deals in equal parts wide open fields with tree pepper and foresty puzzles. So nobody should be completely enraged by this course, at least.

On the downside, those tee pads could really use an upgrade. Carpet or turf plopped on the ground doesn't really prevent roots and uneven soil from tripping players. Use caution. Also, the course could use a bit more signage. I felt a little lost between holes 2 & 3 and 17 & 18 for example. Most notably, there is no lost disc box. I lost a disc on that leafy hillside on hole 8. I can only imagine how many others were lost among that foliage or rolled down into that river- not to mention any of the other dense undergrowth throughout the rest of the course- especially once plants start flourishing. Plus, there isn't much of a wow factor. Two or three holes made me do a double-take, but the majority are garden variety holes that you've played before.

In closing, Greenridge has moments of greatness that poke through the rest, to be sure. You'll get a chance to experience much of what any disc golf course can offer at this course. It doesn't specialize in any one thing, but not every course has to. So, come to Greenridge and experience its grab bag of challenge.