Water pump or radiator or a hose or thermostat housing. Those are normal places on these cars for leaks. When was the last time those items were replaced?
Water pumps are good for about 60 - 65K miles. Radiator and thermostat housing (plastic) are good for about 100 - 110K miles. Hoses vary.
And if went to redline on the temp gauge, yeah, check for a blown headgasket now or soon (head may have warped and the headgasket will go soon).
'95 Alpine M3 LTW
'00 Dakar M Roadster
'02 Topaz M3
Red/White SRF #4 (Chassis 561)