Horseshoe Basin, Boundary Trail #533. 8/4/99 to 8/7/99. Irongate trailhead to Cathedral Lakes is about 26 miles. FS road 39 from near Tonasket is paved. Irongate road #3900-500, turns off right, is a rough, rocky road but quite passable by high clearance vehicles. Trailhead elevation 5800 ft. The trail (an old road) first heads downhill to junction with Clutch Creek trail, ½ mile. It is then fairly level till it crosses a side stream, then starts climbing gently. At 3 miles is a beautiful side hill meadow which was full of lupine and paintbrush. To here, the trail is through lodgepole pine forest. The trail continues through mixed forest and meadow before opening up below Sunny Pass, elevation 7200 ft., 5 miles. From hear to Cathedral lakes the trail ranges from about 6700 ft. to a high of 7600 ft at Cathedral Pass. The trail was in good condition, no snow, with gentle grades. There was water from side streams about every 2-3 miles, sometimes more often. There were a few patches of snow on the mountains around. From Sunny Pass the trail contours through open meadow to Horseshoe Pass 7000 ft., 6.2 miles and a small stream, there is another stream in about ¼ mile. It continues to Louden Lake at 7.2 miles. It then heads around the north side of Rock Mt. to another small basin of meadow and trees. From there it traverses around a ridge in mostly open pine forest with some grass, berry bushes and wildflowers, to a saddle with a small pond to the south of the trail, 9.8 miles. The trail then climbs through open forest and meadow to a ridge of Haig Mt., which had pretty heather meadows with scattered larch and pine. It then traversed down to a crossing of a couple of creeks with camps. There is another camp at the stream which flows off Haig Mt. toward Teapot Dome. The basin SW of Teapot dome and onto Bauerman ridge is quite pretty meadow land. There is a side ridge off Bauerman Ridge at about the level of the trail. As the trail goes over the ridge there is a small pond about 1/10 mile left along the ridge crest, with a faint foot path to it. There was also a small stream and camps just before the ridge crest. From this ridge crest the trail drops to Scheelite Pass (pine woods, no water). The trail traverses into a small basin west of Scheelite Pass with a small stream, possible camps. It then traverses through open pine forest to Tungsten Mine. There the trail splits, apparently the main trail angles left, downhill. I went straight, which shortly lead to cabins remaining from the Tungsten mine. They are being maintained to some degree. There are many trails in this area which are confusing, continuing straight seemed to be heading in the right direction. After about 1/10 mile there was another junction, with a trail angling in from the back left, apparently this was the main trail again. Angling to the right the trail continued toward the headwater basin of Tungsten Creek. Continuing across this junction was a blocked off trail with a sign ""trail not maintained, not recommended for stock"". The Boundary Trail continues into the headwater basin of Tungsten Creek, crosses the creek and climbs to Apex Pass about 7300 ft. (the 7800 ft on the Green Trails map 1996 looks wrong). This section is mostly hillside meadow and rock with scattered trees. Apex pass is a beautiful open saddle with tundra like meadows and scattered larch and pine. The trail traverses into the headwater basin of Cathedral Creek, crosses it, possible camp, and starts climbing to Cathedral Pass in mostly open heather and berry meadow. From Cathedral Pass the view west is down on the open basin of Upper Cathedral Lake. There are meadows, larch and pine trees around Upper Cathedral Lake, quite pretty. Amphitheater Mountain still has some large patches of snow on it. There is a smaller lake, which surprisingly does not show on the USGS quadrangle map, in the open meadow above Upper Cathedral Lake with smooth granite slabs separating it from the country below. From here you can look down on Lower Cathedral Lake, which appears to be in the woods.