The most varied and beautiful part of the entire Black Mesa Reserve lies in the country extending southeasterly from Ord and Thomas peaks and immediately south of the "Big Mesa." This is the extreme upper part of the basin of Black River, which is formed by numerous little streams rising from springs and wet meadows at an elevation of from 8,500 to 9,500 feet. The little meadows form attractive grassy openings in the forest, covered in summer with a multitude of wild flowers and surrounded by the varied foliage of different trees and shrubs. The little streams flow down gently sloping courses, which gradually deepen to form shallow side canyons leading into the main river. Black River is a clear, sparkling trout stream at the bottom of a deep, rugged box canyon, cut through a lava bed and forming a series of wildly picturesque views. The sides of Black River Canyon and its small tributaries are well forested. On the cool northerly slope the forest is made up of a heavy growth of pines, firs, aspens and alder bushes, which give way on the southerly slope, where the full force of the sun is felt, to a thin growth of pines, grass and a little underbrush. At the head of Black River, between 8,000 and 9,000 feet, there are many nearly level or gently sloping areas, sometimes of considerable extent. These are covered with open yellow pine forests, with many white-barked aspens scattered here and there, and an abundance of grasses and low bushes. This was once a favorite summer country for elk, and I have seen there many bushes and small saplings which had been twisted and barked by bull elk while rubbing the velvet from their horns. Immediately south and east of Black River lies the Prieto Plateau, a well wooded mountain mass rising steeply from Black River Canyon to a broad summit about 9,000 feet in altitude. The northerly slopes of this plateau, facing the river, are heavily forested with pines, firs, aspens and brushy undergrowth, and are good elk country. The summit is cold and damp, with areas of spruce thickets and attractive wet meadows scattered here and there. Beyond the summit of the plateau, to the south and east, the country descends abruptly several thousand feet, in a series of rocky declivities and sharp spur-like ridges, to the canyon of Blue River, a tributary of the San Francisco River. This slope, near the summit, is overgrown with firs, aspens and pines, which give way as the descent is made, to piñons, cedar and scrubby oak trees and a more or less abundant growth of chaparral. Small streams and springs are found in the larger canyons on this slope, while far below, at an altitude of about 5,000 feet, lies Blue River.