On 0 servers with real players, out of 2 Steam servers that run it now, fakes and empty ones included. Checked 14:26 UTC.
By its name, de_mirage_winter is a community edit of the official de_mirage, not the map that comes with the game. Servers send it to players from the Workshop when they join.
Over the last 30 days de_mirage_winter was the #1114 map on CS2 community servers, with <1 real players on it at any moment on average - 0% of everyone playing. It ran on about <1 servers with real players at a time. Right now 0 people play it on 0 servers. It is busiest on Sunday around 13:00 UTC and quietest on Monday around 01:00 UTC.
Right now 0, on 0 servers from the Steam server list. Over the last 30 days it had <1 real players on average at any moment. Fake servers and bots are not counted, and Valve matchmaking is not in the list.
On Sunday around 13:00 UTC. The grid above shows every hour of the week in your own time zone.
The busiest right now: Yasha | #5 (0 players), Yasha | #6 (0 players). The full list is under "Servers running it now", and every server has its own page with its history.
de_mirage43,272 players on average
de_dust217,883 players on average
sandstone_fb14,483 players on average
de_mirage_fps6,342 players on average
awp_lego_25,444 players on average
awp_lego_2_fb4,850 players on average
de_mirage_christmas2,855 players on average
<null>1,274 players on average
bhop_emevaelx31,054 players on average
duels_mirage_1x11,002 players on average
de_inferno889 players on average
de_nuke763 players on average