I've hiked this trail with my dog a couple times, the complete 7.5 loop around the lake. The scenery is really pretty and you will get a workout going up and down rises. You'll hear birds and see squirrels, maybe deer. It really is a lovely trail, and especially in the fall when the leaves are changing.
That being said, there are a few negatives. The signage is not very good, so grab a map when you start. The first time I walked it I got quite mixed up near the end because I didn't know which trail I needed to follow. Luckily I saw other people and went the way they did.
Be alert for cyclists! The trail is quite popular with folks on bikes, and you can't always hear them coming until they are almost upon you. I had to snatch my dog out of the way a couple times.
***Use as much tick prevention as possible. Honestly, permethrin your clothes and deet yourself. This past weekend I took my dog for a hike. I sprayed both of us down with repellant before we even left the parking lot. About halfway through I realized I could literally see ticks clinging to the grass. They were all over my pants and shoes, even with the spray. As soon as we got home we both got a bath. I lucked out, but my poor dog was covered with hundreds of tiny ticks. Luckily his oral flea/tick prevention killed them as soon as they bit, but he is still pretty itchy. I probably won't go back in tick season, and may opt to leave the pup home when I do.
In all fairness, we hiked the park in April and didn't have any issues then.