Hart Fell is a Corbett of 808 m in Dumfries and Galloway, Scottish Borders. It is the highest of the 4 register hills recorded in Dumfries and Galloway, Scottish Borders; the next is Ettrick Pen at 691.8 m, 116.2 m lower.
It is the 5th highest Donald. All four of its nearest neighbours lie to the east, so it stands at the western edge of its group. On the Corbetts height ladder it sits between Garbh-bheinn (808.3 m) and Creag Rainich (807.9 m). The summit is marked by a trig point.
