The Around Corby Extension is a 14 mi trail that starts in Brigstock, England and ends in Gretton, England. The trail is considered to be medium to hike and has a total elevation gain of 918 ft. Normally the trail takes 1 day to complete but can be finished in less than a day. Either you are not allowed to bring your dog on the Around Corby Extension or it is generally not advised. The warmest months are June, July, and August and the coldest months are December, January, and February. The wettest months are December, January, and February and the driest months are June, July, and August.Photo Credit:Tim Heaton