TRACKET, JOHN 1991 Journal 46. San Juan Canyon Natural Area, BLM adjacent to Navajo Dam State Park, San Juan Co., New Mexico. Elevation [illegible] July 3-6 grew on the uplands, and there were ponderosa pine come in the (Coast) canyon bottom, mostly above the riparian zone of the lower canyon. Amazingly, for BLM land, unscarred is the canyon by track (or trail?) of cow, sheep or horse! So the Ambrosia growth is quite good. There are several different grasses, a couple different small yellow composites, good quantities of thistle and star thistle, and numerous wild sunflower (Helianthus), most not yet in flower. Weather July 4: As its junction with the river, the riparian area of San Juan Canyon exposes east out west along the north shore of the San Juan. The cottonwood trees here are larger or stronger than those in the canyon, but some is very large. Driving dirt tracks through this grove, the understory is more discontinuous: Lilies, potatoes are quite thick, and save the Equilibrium Type 1 sedges, the composition is like that of San Juan Canyon. Additionally, there are scattered patches of a plant I think/recognize, with pretty 2/3 x 3/2" purple trumpet blossoms of these low bushes. There's a patch just outside front door of my tent. About 3/4 mile up San Juan Canyon is a remarkable archeological feature, a Navajo rock shelter perched atop a 15-18' diameter boulder sitting on the canyon floor. Access was performed by ladder. The shelter was dated to the Governor period (AD 1700-1775?). Weather July 4: was clear in the am, down temp about 60°F. A NW wind came up about 07:05, light & intermittent until 11:30, then gusty & intermittent 5-15 mph. After noon, thunder clouds were visible at all points of the compass, but no rain