With Jeff spending the night at Yellowstone, did a solo trip on a trail very near the condo. Mill Creek. This trail starts just past Alta and heads up, over and down to the Grand Targhee ski complex. Out and back, lots of climbing to get to the top, some pretty steep when you hit the ski area and cat trails/double track.
Jeff actually biked to the same destination on the road a couple days before when Lynn when I were taking a motorcyle ride on the same road.