The A887 road from Kyle of Lochalsh to Loch Ness closely follows the course of the river for much of its length, and is on the north bank at this point.

A small river, the Allt nam Peathrain, flows southwards to pass under the road and join the channel on its left bank.

The main channel continues in an east-north-easterly direction, past the hamlet of Tomchrasky on its northern bank.

A temporary wooden bridge was put in place to maintain the route, and the present three-arched structure was completed in 1823, to the design of Joseph Mitchell, who was Telford's principal inspector.

[3] The is extensive forest on both banks of the river, which gradually widens as it becomes part of Dundreggan Reservoir.

It consists of a single 90-foot (27 m) concrete span with a small flood arch, and was designed by Mears and Carcus-Wilson.

[10] The loch covers an area of 2.43 square miles (6.3 km2), the surface level is 748 feet (228 m) above Ordnance datum (AOD), and it is relatively shallow.

Compensation water for the River Moriston flows through a small power station located at the base of the dam.

[9] From Loch Cluanie, water is fed to a power station at Ceannacroc through a tunnel and pressure shaft.

Once the water has passed through the two 18 MW turbines, it flows into the mouth of the River Moriston through a tailrace tunnel which is 20 feet (6.1 m) in diameter and around 4 miles (6.4 km) long.

Those over the Corrieyarrick Pass are very exposed, reaching a height of 2,507 feet (764 m) AOD, and high frequency pulses are injected into the lines to enable faults to be located.

[14] The construction of the hydro-electric stations has brought some benefits to the area, which are wider than just providing electricity to remote communities.

The dam at Dundreggan was built at a location where there had previously been a waterfall,[15] which made the migration of salmon up the river impossible.

However, a Borland fish pass, which works in a similar way to a navigation lock, was constructed at the site, and unlike the neighbouring River Garry, where salmon stocks have suffered serious decline, salmon have established themselves on the river, and the population is stable or increasing.