ASSESSMENT OF TOURISM CARRYING CAPACITY OF OLO-OLO MANGROVE FOREST AND ECO-PARK IN LOBO, BATANGAS, PHILIPPINES Masa, Jan Racky A., Constantino, Charlene, Jovanne B., and Santos, Katherine T. ABSTRACT The Olo-olo Mangrove Forest and Ecopark (OMFE) in Lobo, Batangas, Philippines is recently developed for marine and coastal ecotourism to provide alternative source of income to local communities. The potential of increasing number of visitors and their related activities may cause the degradation of resources and environment and disturb the welfare of the local communities. Finding the right balance between economic benefits and environmental costs is essential to reach sustainable development, ensuring that tourist numbers do not exceed the carrying capacity of the tourism destination and considering management options grounded on participatory planning. This research aims to determine the sustainability of the ecotourism management in OMFE by calculating the optimal number of tourists who can be accepted considering the physical, ecological environment, social and economic carrying capacities for combined Tourism Carrying Capacity. Carrying capacities were computed using Boullon’s Model applied with Limits of Acceptable Change (LAC) framework. Four (4) LAC opportunity classes mainly incorporating the practices and preferences of the site manager and the visitors were considered in the computation of each type of carrying capacity. Study reveals that the total physical carrying capacity may range from 79 to 2488 tourists per day; ecological- solid wastes capacity of 333 tourists daily; ecologicalwater availability capacity of 20 tourists daily; social carrying capacity of 7200 to 9000 tourists per day; and economic carrying capacity of 17 tourists daily. Combined tourism carrying capacity of OMFE shows that the mangrove park can accommodate a wide range of number of tourists per day depending on which LAC scenario will be applied. The combined carrying capacity is strictly smaller than any of the carrying capacity of the tourism destination. Sets of optimal values to satisfy the physical, ecological, social and economic requirements can be devised. The current tourist influx in OMFE which is only 26 visitors daily on the average is far below the computed combined carrying capacity and can be considered still directing towards sustainable ecotourism. Keywords: Olo-olo Mangrove Forest and Ecopark, Tourism Carrying Capacity, combined carrying capacity, Limits of Acceptable Change (LAC)