River Rock On Hillside . Wonderful rock decoration for your yard. With this great river rock landscaping feature, you will be able to seamlessly combine rocks with your lawn. Pin by Mineral Maidens on Garden in 2020 Sloped garden, Stone from www.pinterest.com With hillside views, an outdoor fireplace and walking distance to the river, it’s the perfect getaway for your family. Boulders as support and landscaping. River rocks make this part of the yard very low maintenance.