I thought RIR 'cause my RIR also has the same coloring and just shed out the darker tail feathers/red-with-darker-blackish-sections. The only difference is your girl has huge feet!
RIRs seem to be more chestnutty or mahogany colored; the NHR pics I've seen online show them as more of a cinnamon.
Hatchery Type R.I. Red (they may have some Brown Leghorn in them to add to egg production & darker color) also with the dark hackles, dark wing bow, and the saddle feathers starting to curl I question it being a hen at this time.
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interesting...I always assumed she was a she...but I have seen her facing off against my lead roo...do pullets do this at times...she would be a couple weeks older than my roo...