Cloudy day with temps in the 55-degree range, great for a tough hike. From Marsh Creek Road up to Mt. Olympia to North Peak to Mt. Diablo. Saw wild pigs, sow and 4 youngsters (could have been more). Few raindrops near the top and low cloud cover at the top. Could see a the delta to the north, but not much in any other direction. Covered about 15-miles.