Agia Triada (Greek: Αγία Τριάδα, meaning the Holy Trinity) is a village in the northern part of the municipal unit of Lasiona, Olympia, Elis, Greece. It is situated near the river Pineios, which forms the border with Achaea here. It is located 7 km northwest of Antroni, 7 km east of Simopoulo, 9 km south of Stavrodromi and 24 km north of Olympia. The Greek National Road 33 (Patras - Tripoli) runs through the village.
The Pineiós (Greek: Πηνειός, Latin: Peneus) is a river in Peloponnese, Greece. It is probably not named after the god Peneus. It is 70 km (43 mi) long. Its source is on the southwestern slope of the mountain Erymanthus, near the village Kryovrysi. It empties into a bay of the Ionian Sea, southwest of Gastouni. For a part of its upper course, it forms the border between Elis and Achaea. The river flows through the plain of Elis. The river passes through the following villages:
Simopoulo (Greek: Σιμόπουλο) is a village and a community in the municipal unit of Pineia, Elis, Greece. Since the 2011 local government reform it is part of the municipality Ilida. Simopoulo was the seat of the former municipality Pineia. It is situated in the sparsely populated hills of northern Elis. It is 5 km east of Efyra, 7 km west of Agia Triada and 23 km northeast of Pyrgos. The community includes the village Agios Nikolaos.