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 Ellicottville's 2019 Christmas Stroll EVL Halloween Half Marathon and 5K 2019 Holiday Valley Beer & Wine Festival 2019 Spooktacular Family Fun Day at the Seneca Iroquois National Museum Scary Stories Friday at the Cultural Center