St Patrick's Day Dash starts at Seattle Center and goes through downtown Seattle on 4th ave and back. Following the race, there will be a post dash bash from 9am-12pm. Tickets are required to participate in the event but you can likely gather signatures from participants outside of the event without having a ticket. If you are able to help us gather signatures, please RSVP and let us know if you need petitions or other materials.
Event info: http://new.stpatsdash.com/index.php/2014-10-15-21-41-22/dash-day-schedule-sunday-march-12
305 Harrison St
Seattle, WA 98109
Google map and directions