Shout it from the battlements: English Heritage properties are starting to re-open! Here's what EH says about its local star property:
"Richmond Castle is open, and operating normal winter opening hours within Tier 2 restrictions. This means that some areas of your visit might be restricted. Full Covid-secure measures are in place, and you need to book your visit in advance."
Effectively, this means the Castle is open Saturdays and Sundays only, 10:00 - 16:00. More details and booking information here.