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Three Sisters is a mountain in Ilocos Sur, about 1,441 m high. Reason for Tier 3: no published hiking information found.
No organizer has listed this yet
Facts stay on this page. A departure appears when an organizer publishes a date on this mountain.
No trail is written up here yet. Organizers can still publish a departure and link it later.
Coordinates on the Wikipedia list come from OpenStreetMap contributors and GeoNames.