Home Boating Golden sunshine and sparkling water offer endless opportunities for boating, fishing, rafting and kayaking, swimming and camping. There are many lakes, streams and ponds for your enjoyment. The Allegheny River flows through the southern towns, two cities and the Seneca Nation of Indians Reservation. This river offers recreation to thousands of fishermen, campers and boaters along its banks and tributaries. Onoville Marina is the Southern Tier's largest marina. Located on the 12,000 acre Allegheny Reservoir, this County operated marina has long been noted as the region's finest, yet most affordable water resort/camping area. Located in the southwest corner of the Enchanted Mountains, the Onoville Marina features 400 dock slips, 70 camp sites, fuel dock, sanitary facilities, launch ramp, picnic shelters, camping, playground, showers, and a round-the-clock staff for any need you might have. Needless to say, you can enjoy almost any activity around the marina. See for yourself the complete benefits that the Onoville Marina offers. Categorized in Autumn Spring Summer Boating Surfing Email this page Travel Guide It's a full 56-page comprehensive guide, highlighting the activities and attractions in our County and it's FREE!! View the visitor's guide online or request that the Enchanted Mountains guide be snail mailed to you for FREE! Related Events 2018 Southern Tier Corporate Challenge Olean Theatre Workshop presents "Motherhood Out Loud" Southern Tier Symphony's 15th Season Session 3 Friends of Good Music presents Fire and Grace Friends of Good Music presents Windsync!