As of February 2025, this is what I consider to be Mild Mountaineering:
Solo (no gear)
Grade I scrambling
Grade II scrambling
Grade I winter
Lead (with ropes/gear)
Grade III/IV scrambling
Grade II winter
Trad climbing up to Diff/5.4
Sport climbing up to 5.8
Second (with a guide leading)
Grade III winter
Anything above these grades is not what I’d call mild…