Lake Oneill   Be the first to submit input for Lake Oneill. If you have info on Lake Oneill, San Diego County, California please submit it here to improve this web site.          These outdoors activities are available near Lake Oneill.   Lakes Near Lake Oneill: Calavera Lake, San Diego County, 9 miles away Pechstein Reservoir, San Diego County, 13 miles away Lake Elsinore, Riverside County, 19 miles away   Public Lands Near Lake Oneill: Carlsbad State Beach, California, 10 miles away San Onofre State Beach, California, 19 miles away San Clemente State Beach, California, 20 miles away Cabrillo National Monument, San Diego - CA, 35 miles away   Marinas On or Near Lake Oneill: Snug Harbor Marina, Carlsbad, 10 miles away Fish Boat Soap, Encinitas, 15 miles away   Camp Grounds Near Lake Oneill: Fallbrook Kamp Retreat, Fallbrook, 8 miles away Melrose Trailer Park, Vista, 9 miles away Sunrise Terrace RV Park, Vista, 9 miles away Casitas Poquitos RV Park, Oceanside, 9 miles away   Hotels Near Lake Oneill: Econo Lodge Inn & Suites Fallbrook, Fallbrook, 6 miles away Super 8 Oceanside, Oceanside, 7 miles away Residence Inn San Diego Oceanside, Oceanside, 7 miles away Courtyard San Diego Oceanside, Oceanside, 7 miles away Ramada Oceanside, Oceanside, 8 miles away   Hiking Trails Near Lake Oneill: Clark Trail, San Diego County, 12 miles away        7.2 hiking miles, 1415 feet elevation difference Clark Trail, Riverside County, 15 miles away        4.8 hiking miles, 877 feet elevation difference Morgan Trail, Riverside County, 17 miles away       2.4 hiking miles, 712 feet elevation difference   Ski Areas Near Lake Oneill: Snow Valley, California, 55 miles away       1041 foot drop, 11 lifts, 30 runs Mt. Baldy, California, 58 miles away       2100 foot drop, 4 lifts, 28 runs Snow Summit, California, 61 miles away       1200 foot drop, 14 lifts, 31 runs   Whitewater Near Lake Oneill: Santa Margarita River, San DiegoCounty, 15 miles away       Class IV(V) - 9 miles long (Murrieta Creek to Sandia Creek Road) Escondido Creek, San DiegoCounty, 18 miles away       Class III-IV - 6.6 miles long (San Elijo Canyon: Elfin Forest Preserve to Camino Del NoRoute Road)