The Marshall ARC currently operates 3 VHF and UHF repeaters:
145.300 (146.2Hz)
146.860 (146.2Hz)
444.150 (146.2Hz)
The 145.300 and 444.150 repeaters are currently linked full-time, with plans to bring the 146.860 repeater into the linked system in the near future.
Echolink node KB5MAR-R (#623991) is also connected to the 444.150.
All of these repeaters are open to properly licensed amateur radio operators.