The Cheviot is the highest hill in the range, and in the whole of Northumberland, at . Other notable tops are
Hedgehope Hill (),
Windy Gyle (), Cushat Law () and Bloodybush Edge (). Of the hills mentioned, only Windy Gyle has its summit on the border; the rest are all within England. The English section is protected within the
Northumberland National Park. Although many of the summits top , most have a relatively low
prominence. Only three rise or more above the surrounding terrain: The Cheviot itself,
Shillhope Law and
Housedon Hill, a small northern outlier (see
Marilyn). To the southwest the Cheviots merge into the
Kielder Forest group of hills. and overlooking the
Breamish Valley There is a broad split between the northern and the southern Cheviots. The former encompass most of the high ground and are pierced by five main valleys: •
College Valley • Harthope •
Breamish • Bowmont • Heatherhope valley The southern Cheviot Hills encompass the slopes running down to the valley of the
River Coquet while the northern Cheviot Hills end near the valley of the
River Tweed. == Geology ==