The historical summit trail at Diamond Head State Monument reopened Nov. 21 after undergoing a month of repairs, according to the Hawaii Department of Land and Natural Resources.
Maintenance included repairing the slopes and rock for potential rockfall hazards along the trail.
The area inside the crater, including the parking lot and adjacent fields, rest room and information booth, remained open to the public during most of the work.
Construction also included carrying out rock scaling work above the Kahala Tunnel, which serves as the only entrance into the monument.
The Diamond Head State Monument summit trail attracts more than 600,000 residents and visitors annually.
The summit trail has deteriorated due to increases in visitor numbers and erosion.
The maintenance of these areas is the first phase of the state's planned upgrades to the summit trail at Diamond Head State Monument.
Subsequent phases will include the Diamond Head Trail Improvements Project, now currently in design, which will improve sections of the trail that have deteriorated.
Improvements will include installation of safer stairways, wider walkways and slope stabilization and rockfall mitigation measures, and construction of a loop trail connecting the Summit Lookout and the rest stop landing at the top of the pedestrian tunnel.
Future phases of the Trail Improvement Project will seek to decrease hiker congestion on the Summit Trail by expanding the trail to improve the safety of walkways, stairways and lookouts.
Future phases of the rockfall mitigation and slope stabilization project will include work along Diamond Head Road and Poka Place.