River Running is an Adventure book for use with the Middle Earth Role Playing Game (MERP).

River Running is a collection of six detailed adventures set around the Dorwinrim. These adventures follow a scheme, with the first and second adventures being suitable for beginning characters, while the fifth and sixth adventures are suitable for higher level characters. GMs can use the six adventures as a campaign, or play them individually. The River Running also includes more than 12 pages of maps, as well as very detailed information on all the NPCs and settings in which the adventures take place.

The six detailed adventures are:

The Corruption of Durannon Wood
Hijacked Wine Barge
The Gargoyles of Haradruin
Carnage at Forodim
The Wounded Drake
& The Man-Wolf of Galgorin

At the end of this adventure pack there are also rules on 'doing business in Dorwinion'.