Sap S. on Lake Estes Trail
I wouldn't consider this a 'hike'. Very easy walk and great views of the mountains if you can see past the electrical towers.
Fun bike ride from the lodge (about 1.5 miles west of town) and around the reservoir. One morning we even ate an early breakfast at a nearby restaurant ("McDonald's") as part of the ride. The loop passes the Estes Park City Visitor Center where several helpful, friendly staff spend all day answering questions.