Page:A Guide to the National Parks of America (1915).djvu/77

 geysers are very interesting, but unfortunately have been seldom in eruption for the last two seasons.

At the left, just above the bridge on the extreme edge of the river, is the Riverside, one of the prominent geysers of the basin. Its period is very regular, ranging from six to seven hours. An overflow from the lower opening presages an eruption within an hour and a half. A camp site is located on the knoll above the Riverside Geyser. Camping not being allowed in the basin, the next camp site is south of Old Faithful Geyser, nearly 2 miles by road from this point.

At the left and close to the road is the Grotto Geyser, differing from most in that the empty crater is more interesting than the eruption. At this point it is usual to follow the path instead of keeping to the road.

From here to Old Faithful Geyser there are two roads and a path. The road to the left is the direct road, but it does not pass any curiosities except Castle Geyser. (See description under the trip by path.) The road to the right (the Blacksand Road) is slightly longer and passes many curiosities.