It is thought to have last erupted in the 1860s. Its name is derived from the Maasai word oloonong’ot, meaning “mountains of many spurs” or “steep ridges”. A 3.1km trail runs from the park entrance up to the crater rim and continues in a 7.2km loop encircling the crater. The whole tour (gate-around the rim-gate) of 13.5km takes about 4-5 hours. Longonot is a stratovolcano which contains a large 8 x 12 km caldera formed by vast eruptions of trachytic lava some 21,000 years ago. The current summit cone was developed within the earlier caldera. This cone itself is capped by an 1.8 km crater. Satellite cones and effusive lava eruptions occur on the flanks and within the caldera floor.Periodic geodetic activity recorded at Longonot in 2004–2006 demonstrated the presence of active magmatic systems beneath this volcano .

Price per person US$ 160

Price includes; Transport Lunch Entrance fees Service of English speaking driver guide