What race is this?
The photo quality is very poor but I'm going to hazard a guess at a young Welsummer. I was tempted to say possibly a brown leghorn initially from her build but she has no comb to speak of hence my Welsummer suggestion.. How old is she and is she definitely a pure breed or could she be a mixed breed bird?
A clear, close up, side view photo would be much more helpful in identifying what she is.
If she is a mixed breed bird then she is not a breed. Do you know anyhting about her parentage? There could be any number of breeds in her background and it would be mostly speculation on our part even if you had a good close up side shot and another of her comb.... that third photo is really not any more helpful. Her legs look like they might be green in that one whereas they look yellow in the first.
Generally people refer to mixed breed birds as farmyard mixes or mutts