#4 A celebration to mark the sixth anniversary of Ottumwa’s mountain bike trail is set for Saturday. The day will begin with a noon cleanup of the trail; the city is seeking volunteers to assist with the effort. Residents will meet at the Merrill log cabin in Memorial Park and are encouraged to bring their own tools, such as weed eaters, loppers, saws, gloves and boots. At 2:30 p.m., a trail ride will begin in celebration of the anniversary. For more information, contact Parks Director Gene Rathje at 641-682-8208 or organizer Jim Langland at 641-777-3212.