Semonkong is a small town in central Lesotho. In Sesotho, Semonkong literally means Place of Smoke, which is a reference to the huge 200m Maletsunyane Falls which is close to the town.
Semonkong is about 120km from Maseru. From Maseru, follow the signs to Roma where you will find the only gas station you will encounter during your oncoming trip. Also, there is a small Chinese grocery store to stack up on supplies, since Semonkong itself doesn't have that much to offer. Follow the tarmac all the way until you get there.
The journey takes about 3-4 hours. Theoretically it is possible to do in a powerful saloon car, which will take about 5 hours when weather conditions allow. You might not want to do it overloaded and certainly not with your own car. Note that cellphone reception is limited. Semonkong lodge have a free shuttle every tuesday and friday from Maseru to Semonkong they collect you at tourist information in Maseru.
Minibuses run from Maseru to Semonkong (and vice-versa) on a daily basis and leave from the major (and perhaps only) transit station in Maseru. The cost was M70, and the drive took 3.5-4.5 hours (April 2014). As with public transport in many countries of Africa, do not expect an exceptionally comfortable ride.
Semonkong is small enough for it to be possible to get around by foot.
You can also go to the viewpoint by car: When you are about to cross the bridge to Semonkong, turn right and follow the signs to Maletsunyane Falls. Drive for about 9 km on a mysteriously good road until you see a sign pointing to your left (you can see the gorge on your left). Go onto the grass road for a while and you have a beautiful view over the entire gorge and the falls.
Although there are some shops which sell basic footstuffs, there's not much in the way of other shopping!