Tantalus, Mountain summit in Oahu, United States
Tantalus is a summit on Oahu featuring a crater at its peak and natural slopes covered with eucalyptus and guava trees. The mountain provides expansive views across the island and surrounding waters from its highest point.
The U.S. Army built a fire-control station on the mountain during World War II to defend the Pacific coast. This installation worked in coordination with another station at Diamond Head for broader surveillance.
The mountain carries a name from Greek mythology, given by Punahou School students, while native Hawaiians know it as Puʻu ʻŌhiʻa. Both names reflect how different groups have connected with this place over time.
The road to the summit is narrow and winding, so drive carefully and watch for oncoming traffic. Parking at the top is limited, so arriving early helps secure a spot near the viewing area.
Since 1974, the Tantalus Time Trial has challenged cyclists to race from the base to the summit each year. This cycling event remains one of the longest-running competitions in the islands and still draws athletes today.
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