This example displays a topographic map of hiking trails, trailheads, and open spaces near Los Angeles using ArcGIS API 4.15 with a MapView. It visualizes trails as purple lines scaled by elevation gain via visual variables, and overlays bike-friendly trails with a dashed renderer. Trailheads use picture-marker symbols with labels, while parks appear as semi-transparent colored polygons categorized by type. Data comes from ArcGIS FeatureServer layers, rendered client-side with FeatureLayer classes and custom renderers.