Here are the major food truck festivals in Seattle.  All three events are produced by Piranha Blonde Interactive.

Mobile Food Rodeo 2014 will be over the upcoming Cinco de Mayo weekend and done in two different neighborhoods.  A total of 43 trucks are expected during the whole weekend and loads of other vendors.  Admission is free, but you can get a Very Important Foodie (VIF) pass for $25 for express queuing at the trucks.

May 3 (Saturday) – International District: 526 King St., Seattle, WA 98104
5:00 pm -11:00 pm

May 4 (Sunday) – Fremont: 3501 Phinney Ave., North Seattle, WA 98103
11:00 am – 7:00 pm                                                                                                                

Next up is the Seattle Street Food Festival 2014 which would also be done for two days.  The VIF express pass would also be available.

August 8 and 9 (Friday and Saturday) – Cal Anderson Park: 1635 11th Ave, Seattle, Washington 98122

Due to the success of these two events, they will now be launching Trucktoberfest.

October 4 and 5 (Saturday and Sunday) – Husky Stadium E Lot: University District, Seattle, WA 98105

Also check out the regular spots and locations of food trucks at Seattle Food Truck.  Just click on the ‘Hoods’ button.