Region 6 is one of 10 geographic regions of the IEEE. Region 6 covers the Western U.S. – from Alaska to New Mexico and Montana to Hawaii and is shown in purple in the map above. The Region has 35 Sections and 2 sub-Sections, organized in to 5 Areas: Northeast, Northwest, Central, Southern and Southwest.
See here for a list of the Sections and Chapters and Affinity Groups see here.
There is an incredible amount of engineering history in Region 6. Just look at the Engineering Milestones site. Or see the list of Milestones by year and location.