We've visited Greenwood Park many times, but today was our first time hiking there. We parked at the playground and then walked down the hill to find the CITA Trail, which you'll see on either side of the road before you reach the pond.
All Trails shows a 2.7-mile loop, but we chose to shorten it to a 1-mile loop around Ashworth Pool and then cutting across the frozen pond.
My kids really like the playground at Greenwood Park, which is why we chose to park next to it. There are restrooms by the splash pad, but they're locked in the winter.