Los Ilinizas Ecological Reserve extends across approximately 150,000 hectares of volcanic peak, small-cropper fields, páramo (grasslands), cloud forest and valley. It is accessed just 55km south of Quito and extends through much of the Quilotoa Loop area. There's great hiking here – much of it on unnamed trails that locals can point out.
The small village of El Chaupi is your best northern access point to the park's twin peaks, Iliniza Norte (5126m) and Iliniza Sur (5248m), respectively the sixth- and eighth-highest mountains in Ecuador. Once part of a single volcanic cone, the two spires are now separated by a narrow, sloping saddle.