Carlisle is where the Roman frontier met the border of two kingdoms, and the city holds all of that history in a compact space. The Romans built a fort here called Luguvalium, beside the River Eden, and it was an important base for the western end of the Wall. In the Middle Ages the red sandstone castle was the stronghold of the English border, and Mary, Queen of Scots, was held there for two months in 1568 after fleeing across the Solway. The cathedral, one of the smallest in England, has a huge east window and a painted ceiling of gold stars on blue. Tullie House Museum tells the story from the Romans to the border reivers, the raiding families of the borderland.
Boomby Lane, east of the city centre, is the site of two Roman temporary camps, the sort of overnight earthworks that armies built on the march, and you will need an archaeologist's eye to see them. The ground is flat farmland on the north bank of the Eden valley, and the importance of the camps lies in the fact that they show how many Roman soldiers moved through here before the Wall was built, and later too.
The surrounding country is gentle, with fields of cattle and sheep, hedged lanes and red sandstone villages. The Eden is a beautiful river, with salmon and otters, and the Pennines rise on the eastern horizon, a blue line in clear weather. The railway from Settle to Carlisle, one of the most scenic in Britain, arrives here from the south.
The riding is better outside the city. Narrow roads wind through the villages of the Eden valley, with long views to the fells, and the Solway plain to the north has fast, open roads. In Carlisle itself, traffic is busy, with ring roads and roundabouts, and it takes patience. Fuel is easy to find, with many stations, and the city has a big choice of cafés and restaurants. Dalston, a few kilometres south-west, is a small village with a pub. Spring and autumn are the best seasons for a visit, and the Lake District, to the south, is within an hour.