Florissant Lake basin is a mountain park divided by a ridge into two portions. The surrounding mountains are not as high and abrupt as at Estes Park but more rolling, and streams are small. Can jump across the two streams at Florissant now. The old lake beds so far as we saw them today are mere remnants of former more extensive beds, and contain many bands of volcanic ash and sand, the main portion of the beds, except in patches along the edges of the marginal hills, having been eroded away. Igneous dykes border the old lake basin at various places, but as yet see no connection between these and the volcanic debris in the lake beds. I believe the igneous rocks are older.