From Kabarnet, it's about 90km on the C51 to Eldoret across the hot and fascinating Kerio Valley. The excitement of this route builds only after you leave Kabarnet town and plunge into the valley, a drop of 1000m in not much more than the same distance. There are magnificent views as the road rolls through Chebloch, crossing the Kerio River at Chebloch Gorge, after which the road turns sharply up the Tambach escarpment on the western side of the Kerio Valley. A turn right just before the hamlet of Biretwo is the start of the lonely trans-valley route north to Tot. Also before Biretwo, look out for the Torok Falls, looming high above and to your left at the top of the Tambach escarpment. They’re worth a visit if you like waterfalls; count on a good half-day if you’re hiking up. The ascent of the escarpment is equally spectacular by road, after which there are a couple of worthy reasons to stop at Iten – Kenya’s famous running centre – to admire the valley from the western escarpment, and perhaps pull on a sweater, given the increase in altitude.