The Twin Brook Recreation Area is a 240 acre park with multiple, easy short-trail systems totaling about four miles (note that some trails have short hills that can have 20+ feet of steeper pitch to climb, but it's easy enough to do--most of the trails are fairly level). If you time your hike right when few or no people are using these trails, you will have the treat of feeling completely alone in a beautiful wilderness. Presently, the trails are not well marked, but plans are to mark them in spring 2010. You must cross open sometimes hilly areas of the park to enter any trail. Terrain can be wet and muddy. Suggest wearing old shoes or sneakers, you will get dirty when it is wet or mucky (I use ankle-high rubber boots). Beautiful place to bring dogs off-leash. A brook in-between the Greely/Tuttle side park areas provide dogs a safe 1-2 foot deep place to swim to their heart's content. This is a family friendly park, just a handful of picnic tables to use, bring your own table or a blanket, easy-to-reach bathrooms, one large recreation building to rent for any event. Remember that the park is permitted out for uses by sports groups or other activities. In winter, dogs are expected to remain on the Greeley side of the park and away from groomed cross-country ski trails--found on the Tuttle side. Wear “teeth on your feet” for winter walks—ice on trails make for slippery slopes. Most trails can be walked 1/2-1 hour. And, until they're marked, make sure you have your bearings, watch for landmarks. If you do get lost, don’t worry, these are the kind of trails where you can eventually find your way. This recreation site never disappoints--it's a joy to have it so close to my home.