Hawai'i Sentinel Landscape

  • Hawai'i

  • Established 2024


The Hawaiʻi Sentinel Landscape spans over two million acres, featuring priority conservation, agricultural, and Department of Defense (DOD) mission lands on the islands of Kauaʻi, Oʻahu, and Hawaiʻi Island. Given Hawaiʻi’s scarcity of land, these areas offer a chance to promote the conservation of natural and cultural resources, mitigate threats from encroachment, and promote land use that complements military activities.

Key military installations within this landscape include: Pōhakuloa Training Area on Hawaiʻi Island; Pacific Missile Range Facility on Kauaʻi; and Marine Corps Base Hawaiʻi, Joint Base Pearl Harbor-Hickam, and U.S. Army Garrison Hawaiʻi on Oʻahu. These sites support the Military Services in maintaining regional power balances in the Indo-Pacific, enabling forces to coordinate on training that fosters a resilient and rapidly innovating Joint Force to deter aggression.

In Hawaiʻi, rapid urban and residential development threatens agricultural lands, native forests, and critical habitat while also obstructing low elevation flight and drone training, radar, and communication antennas. Climate induced threats further challenge military readiness, community resilience, and cultural resources. For example, sea level rise and extreme weather anomalies erode shorelines, increase flooding, and impact underground aquifers. Extended drought periods impact freshwater resources and lead to more frequent wildfires. The Hawaiʻi Sentinel Landscape enables more than 20 federal, state, local, and non-governmental partners to collaborate on landscape-scale solutions to address these shared challenges.


In The News

  • Navy Partners with State of Hawaii to Improve Waiawa Watershed

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  • MCBH partnering with DLNR and others to support $8.7 Million REPI Challenge project to target invasive species in waters surrounding the Mokapu Peninsula

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  • MCBH and the Community Work Together to Combat Invasive Species

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Meet the Coordinator

Carlos Castillo


Carlos Castillo is a Program Manager with the Trust for Public Land (TPL) and Coordinator of the Hawaiʻi Sentinel Landscape. Mr. Castillo specializes in the social, economic, and environmental effects of land use planning, focusing on the Hawaiian Islands and Pacific Region. With years of experience in land use and regional planning, he is dedicated to advancing sustainable land use practices that conserve natural resources, enhance resilience, and protect open space.

Prior to joining TPL to coordinate the partnership, Carlos worked in the private, public, and academic sectors focusing on environmental planning. He is a member of the American Planning Association and is a U.S. Coast Guard Search and Rescue Veteran. Carlos is a graduate of the University of Hawaiʻi , holding degrees in Planning, Geography & Environment, and Disaster Management and Humanitarian Assistance. In his free time, he can be found surfing and sailing the waters around Hawaiʻi .