Home » Videos Video from the 2013 Holiday Valley Mudslide In this video, watch as participants, of all ages, climb over upside-down snowtubes on water, jog through a hanging foam-column forest and slide in mud at the 2013 Holiday Valley Mudslide on June 15, 2013. Tagged in Summer Adventure mud run Ellicottville Great Valley Mansfield Login to post comments 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 Allegany State Park's Classic Car Cruise In 2019 "Rock the Park" at Allegany State Park "Dog Days of Summer" at Allegany State Park 2019 Family Beach Party at Allegany State Park Allegany State Park Celebrates National Public Lands Day