Casitahua is a dormant, eroded volcano

Volcano

2. Bedrock3. Conduit 4. Base5. Sill6. Dike7. Layers of ash emitted by the volcano8. Flank| 9. Layers of lava emitted by the volcano10. Throat11. Parasitic cone12. Lava flow13. Vent14. Crater15...

 in the north of Quito Canton, Pichincha Province

Pichincha Province

Pichincha is a province of Ecuador located in the northern sierra region; its capital and largest city is Quito. It is bordered by Imbabura & Esmeraldas to the north, Cotopaxi & Santo Domingo de los Tsáchilas to the south, Napo & Sucumbíos to the east, and Esmeraldas & Santo Domingo de los...

, Ecuador

Ecuador

Ecuador , officially the Republic of Ecuador is a representative democratic republic in South America, bordered by Colombia on the north, Peru on the east and south, and by the Pacific Ocean to the west. It is one of only two countries in South America, along with Chile, that do not have a border...

. The volcano is in the Western Cordillera of the northern Ecuadorian Andes

Andes

The Andes is the world's longest continental mountain range. It is a continual range of highlands along the western coast of South America. This range is about long, about to wide , and of an average height of about .Along its length, the Andes is split into several ranges, which are separated...

, between Pululagua Volcano

Pululagua

Pululagua is a dormant volcano in the north of Quito Canton, Pichincha Province, Ecuador. The volcano is in the Western Cordillera of the northern Ecuadorian Andes, approximately west-southwest of Mojanda and north of Casitahua volcanoes...

 to the north and Pichincha Volcano approximately to the southwest. Casitahua's caldera is open approximately towards the west-northwest.

Casitahua is surrounded by the urban parishes El Condado and Cotocollao

Cotocollao, Quito

The Cotocollao Parish is a parish in northwest Quito, Ecuador. The use of space in the area is primarily residential, however it also has a very active commercial zone around the Avenida de La Prensa....

 of the city of Quito

Quito

San Francisco de Quito, most often called Quito , is the capital city of Ecuador in northwestern South America. It is located in north-central Ecuador in the Guayllabamba river basin, on the eastern slopes of Pichincha, an active stratovolcano in the Andes mountains...

 to the south, and by the rural parishes Calacalí

Calacalí

Calacalí is a rural parish of Quito Canton, Pichincha Province, Ecuador. It is northwest of Casitagua Volcano and southwest of Pululagua Volcano....

 to the northwest and San Antonio

San Antonio de Pichincha

San Antonio de Pichincha, or simply San Antonio, also but less frequently known by its older name San Antonio de Lulumpamba , is a rural parish of Quito Canton, Pichincha Province, Ecuador. The seat of the parish lies in an arid plain with sandy soil known as Lulumpamba...

to the east.