Portland's Cinco de Mayo celebrations are so big we actually own cincodemayo.org! Personally, I'll celebrate any victory over the French.
11am-11pm, Saturday May 2nd, Sunday May 3rd and Tuesday, May 5th
If you find any factual innaccuracies in this post, please email me via richard at thingstodoinportland dot org so I can fix it for everyone. Thanks in advance!
Tom McCall Waterfront Park, 1020 SW Naito Pkwy, Portland, OR 97204 [Google map].