There are 3 reasons why you should visit Lake Compounce...
1. Boulder Dash. It was one of the longest and fastest wooden coasters on earth when it opened in 2000, and still gives a great ride after 10 years. It's built completely into the side of the mountain, and much of it is in the woods with trees obstructing your view, so you don't know what's going to happen next. I have been on quite a few coasters, and BD remains one of my all-time favorites!
2. The Sky Ride. It's like no other. This one takes you some 800 feet up Compounce Mountain and back. When you get to the top, you're at one of the highest points in the state, and have a spectacular view of the CT valley. You can see Hartford and on a clear enough day, all the way to Long Island Sound! The ride lasts over 20 minutes, and is very relaxing, unless you're afraid of heights! (The sky ride closes in October).
3. The Haunted Graveyard (in October) is one of the largest Halloween attractions in New England. This hour-long walk-through includes among other things a vampire castle, haunted mansion, and the graveyard of course. It is VERY scary and is not for the timid (I have a 40 year old uncle that won't got through!) And it's for a good cause; the proceeds go to charity. In addition, there are many smaller haunted houses/Halloween attractions scattered throughout the park, and most of the rides remain open. The Graveyard and the rides require separate admissions.
If you're a nostalgia buff you might also like the Wildcat coaster. It opened in 1927, and is the oldest coaster in New England (it is rickety, but sure was fun to operate.) There's also a beautiful c.1895 hand-carved wooden carousel, and an open-air trolley that used to bring guests to the park before cars were common, on a VERY short track. The rest of the rides are standard ones that you'd find at any amusement park, although these's a good mix of rides for families, kids, and thrill-seekers alike.
If you're looking to beat the crowds, go on a week-day during the latter half of June, or one of the first Fridays in October. These are the times when crowds tend to be thinnest. If possible, avoid visiting in August, even during the week, as this is the time when many large corporate picnics are held and families rush to visit before summer ends. People pack themselves into the waterpark like sardines, and the lines for the rides are generally VERY long. Plans are currently underway to expand the park significantly, especially the waterpark, and this should help with overcrowding, but this won't be finished for the next several years.
If you have any questions about the park (or the "Lake", as locals call it), message me, and I'd be happy to help, as I worked in ride operatoons for 3 years, and have patronized the park my entire life.