The Columbia River Classic race at Portland International Raceway has always had a LBC focus since it shares the venue with the Oregon All British Field Meet. But this year it is also the Triumph focus event, featuring the awarding of the Kastner Cup. There will be a special Triumph-only race as well as the famed Battle of Britain event.
If you drive a Triumph-based race car, this is your event. If you drive a British race car, this is your event.
Details at
http://www.sovren.org and
http://www.crclassic.org