Sultan.

"Walk to the pass between the Hidden Lakes Peaks on the Lookout trail. The higher summit is to the north (7080’), the south summit contains the old fire lookout building. The north summit is the best monitoring site, but difficult to access from the south because of large blocky boulders. Ascended a snowfield to a low point in the ridge at 6850’, at the base of the slope leading to the northern summit. Very good monitoring site with plenty of room to set up and safe location for people. Night of Perseid meteor shower, many bright meteors seen. Bortle Class 3. Seeing very good, transparency fair. Smoke from distant fires throughout, brown color seen to east. Visiblility in daytime no more than 40 miles. Light dome seen from Vancouver as a broad glow stretching from 340 azimuth across the northwestern horizon, centered on Mt. Baker, to about 300, up to 15 degrees altitude, significantly brighter than the brightest part of the Milky Way. Another light “bump” at 270-280, much smaller than Vancouver, then an even brighter light dome beginning at 220, 35-40 degrees wide, 15-20 degrees tall, bright enough to affect night vision. No other light domes. Bright airglow, extending to 30-35 degrees altitude. Around the Zenith, the Milky Way exhibits all details from Scutum to Cassiopeia, excellent sky within 40 degrees of Zenith. Zodiacal Light not seen, partly because of its position low in the east and south. Darkest area of the sky around the head of Draco, considerably darker than the other side of the Milky Way where more airglow is present. SQM 21.42 end of 4th set. ZLM 7.1 in Draco (both Dan and Bob)."

"Diablo Lake Overlook, set up at the overlook handrail. Beautiful sky, despite direct glare from unshielded lights on Diablo Dam. These are bright enough to affect night vision, but amber in color. Near the Zenith the sky is pristine, and this location would make an excellent place for public astronomy programs, just need to strategically put trees to shield dam lights and the headlights from cars on the highway. Illuminance measures taken with ND filter of the dam lights. Two full sets of night sky data taken despite horizon obstructions from mountain peaks. Difficult to rate as to Bortle class because of the obstructions, but nearly Class 2; traces of a light dome to the west seen at low points in the horizon. Airglow bright again, ZLM 7.1. Transparency good, seeing good."