Rumicallarina is at the head of navigation for steamers on the Huallaga. Any steamer which can ascend the river to Yurimaguas can continue on to Rumicallarina, beyond which place only five or six feet, at the season of low water, can be carried to Chasuta.
LIST OF DISTANCES ON THE HUALLAGA.
Atlantic ocean to mouth of the Huallaga, 2430 miles By the Amazon river.
| Huallaga River. Miles. | |
| Mouth of the Huallaga to Laguna | 17 |
| Laguna to Santa Lucia | 26 |
| Santa Lucia to Santa Maria | 55 |
| Santa Maria to Yurimaguas | 26 |
| Yurimaguas to Cainarachi | 38 |
| Cainarachi to Rumicallarina | 8 |
| Rumicallarina to Chasuta | 50 |
| Chasuta to Lake Chiquicoba | 300 —— |
| Length of the Huallaga river | 520 |
| Distance from the source of the Huallaga to the mouth of the Amazon | 2950 |
UCAYALI RIVER.
The Ucayali river has its origin in the Andean region, about Lake Titicaca, and flows, under various names, in a direction nearly north until it mingles its waters with those of the Amazon, to which river it bears the same relation that the Missouri does to the Mississippi; that is to say, like the Missouri, its length and volume of water entitles it to be considered a continuation and not a tributary of the main river. During the season of low water 24 feet can be carried from Nauta, at the mouth of the river, to Sarayacu; 18 feet from Sarayacu to the mouth of the Pachitea river; and 12 feet from the mouth of the Pachitea to the confluence of the Tambo and Urubamba. The average current from the mouth of the river to Pucacura is 2 miles per hour, and from Pucacura to the confluence of the Tambo and Urubamba 3 miles per hour. The Tambo is probably navigable for steamers drawing eight or ten feet of water to the confluence of the Ene and Perene, and thence the Perene would afford communication, at least by canoes, to San Ramon, a Peruvian military post; from San Ramon to Tarma, and from Tarma to Lima, would, of course, be the continuation of the route to the Pacific slope. The first step towards the opening of this most desirable of all the routes between the Pacific coast and the Amazon would be the establishment of a battalion post at the confluence of the Ene and Perene, communicating at regular and stated intervals with San Ramon. The distance between the two posts would be about 60 miles of canoe navigation, and would soon become a traveled route forming the connecting link between eastern and western Peru.
MOUTH OF THE UCAYALI.
Latitude, 4° 28' 30" south; longitude, 73° 21' 30" west of Greenwich; magnetic variation, 7° 2' east; thermometer, 80°; elevation above sea-level, 318 feet; distance from the Atlantic, 2180 miles; current, 2 miles per hour; the width of the Ucayali at its mouth is half a mile.