The Blue Course at Clube de Golf do Estoril was designed by Frank Pennink and opened in 1945, making it one of Portugal's oldest golf courses. Pennink, a British architect active in continental Europe during the mid-20th century, routed the course through gently rolling terrain near the coastal resort town of Estoril, just west of Lisbon. The layout reflects the design principles of its era, with tree-lined fairways, strategic bunkering, and relatively modest length by contemporary standards. The course occupies land characterized by umbrella pines and eucalyptus trees, which frame holes and influence play. The terrain features moderate elevation changes that add variety to the routing without creating severe slopes. Several holes require accurate placement off the tee to navigate doglegs and avoid the mature trees that define corridors. The greens are typically elevated and well-defended by bunkers, rewarding approach shots that account for the prevailing Atlantic breezes. Clube de Golf do Estoril has long served as a social and sporting center for the region's golf community. The club's proximity to Lisbon and the Estoril casino district has historically attracted both local members and international visitors. The Blue Course has hosted Portuguese national championships and regional amateur events over the decades, contributing to its role in the country's golf development. The clubhouse maintains traditional Portuguese hospitality, and the course remains a fixture in the Lisbon golf scene.