If you would just like a nice walk and a nice view of the region and do not want to go too far from Eldoret, try Ndalat Hill.
Cross the Sosiani River and drive south, out of Eldoret, on the C39. After only a few kilometers, turn right (west) onto the D288 and pass Rivatex Factory. After 25 km you will reach Ndalat shopping centre where your vehicle can be parked.
The hill is 2196m high, which is only about 130m higher than Eldoret, so it is not really a challenge to reach the top; but, its open, grassy slopes are steep in places and can be slippy, especially after rain. The local community are very friendly and will even keep you company on your hike.