« All Events This event has passed. Patapsco Valley State Park (Hollofield Shelters) March 28 @ 5:15 am OSHA 10 Hour for Construction 2 Day Course » Add to calendar Google Calendar iCalendar Outlook 365 Outlook Live Details Date: March 28, 2024 Time: 5:15 am Venue Patapsco Valley State Park (Hollofield Shelters) 8020 Baltimore National Park Ellicott City, Maryland 21043