I didn’t realize until yesterday that the CCSS trainings are regional. Here is a page with other dates and locations for spring training (all are in April): http://www.cosa.k12.or.us/news/regionalccsstrainingsscheduledforfallandspring.html
There is a registration fee to attend. I am attending as part of our district team because I meet with College Credit Now faculty in the fall and I was in conversation with our CCN coordinator about the CCSS. I am sure other schools and service districts are sending teams. For people who are interested in attending, you may register as an individual or you might ask a CCN coordinator about participating as part of the district.
For more information on the content of the training, visit this COSA page. This information is useful if you would like to prep for the meeting, or if you can’t attend but want to get an idea of what might be covered.