-The New Mexico & Arizona Railroad Trail, also known as the Railroad Grade Trail, is a rustic hiking and equestrian trail between Rio Rico and the Sonoita Creek State Natural Area -The area provides prime habitat for birds, including rare ones, best viewed in March through September or late April through May -There aren't many "rails to trails" in Arizona, but another is located just up the road in Patagonia www.traillink.com/trail/new-mexico--arizona-railroad-trail/ Map