Snow in Einsiedeln doesn't look so super but the Loipen are open.
Schwedentritt Loipe
I don't know about this year, but in the past, the guy who looks after the
Loipe Bolzberg which goes towards Trachslau was always very industrious and used to collect snow from other places to improve the loipe when it had suffered a bit in places.
Rothenthurm is very open and I bet it is chilly in the morning but skating is 'good' so that is another possibility