Mountain Bumble-bee (Bombus monticola). ID based on key in Edwards & Jenner (p 40-41) - but comments appreciated.
Tiger beetle spp. - not sure this is the same baest that runs across the sandy dunes and heathland of Southern England. These chaps, and there were loads of them, seemed considerably smaller than Green Tiger Beetle. But who knows? Not I.
And then, just as we got back to the car, I located a Dipper's nest, complete with Dippers.