A model for simulating pedestrian recreational movement along a tourist trail is introduced. The model reduces the two-dimensional nature of bidirectional flow to one dimension while preserving the inter-agent interaction and density-induced velocity reduction. This is achieved by applying kernel estimates of pedestrian density to describe the pedestrian mass in the perceived surroundings of an agent. The applicability of the model is investigated by means of numerical simulations using three speed distribution scenarios and three arrival rate scenarios. The simulation results are in correspondence with expectations and recommendations related to capacity for day-use facilities in national parks (pedestrian level of service D). The model mimics the expected trail capacity behaviour represented by arrival rate, leading to speed deterioration and stoppages. Heterogeneity of the agents similarly as non-homogeneity of arrival rate leads to clogging at smaller average arrival rates.