The C448 is the road into and through Glen Lyon, one of the Highlands most picturesque glens, which runs west from Appin of Dull near Aberfeldy, deep into the hills and mountains towards Rannoch Moor. Whilst the road is ultimately a dead end, it is a fine drive which is well worth exploring, with scenery, history and wildlife to enjoy along the way. The route is almost entirely single track, which can cause some problems in peak summer, but otherwise the light traffic copes well.
Starting on the B846 at Coshieville, the road heads west, following the north bank of the River Lyon to Fortingall. This small village is famous for the ancient yew trees in its churchyard. Beyond the village, the road sticks close to the river bank as the two wind westwards, threading their way through the narrow entrance to the glen. The valley floor opens out a little before reaching Invervar, from where 4 Munros can be reached in a single round by the most energetic Hill Walkers!
Houses can be spotted on the south side of the river now, reached by a bridge at Camusvrachan a couple of miles further west. The lower slopes of the hills are dotted with small patches of woodland and forestry plantations, and the roadside is often lined with trees, but there are places to stop and explore a little as the road continues west to Innerwick and Bridge of Balgie. Here, the C448 comes to an end, with a junction offering explorers the chance to continue westwards up the glen, or turn south and climb up over the pass to meet the A827 above Loch Tay, near Killin.