I hiked here on my recent trip to Concord. I hiked the dike trail and it was a gorgeous day! If you go early in the day, you're more likely to see a variety of birds. The trail is mostly flat, although there is a small segment that goes through the woods. There is a nominal fee at the parking lot (think it was $4) but it wasn't very crowded when I arrived and only saw 5 or 6 people while there. I highly recommend this trail and will definitely visit again next time I'm in the area.See more..