On Wednesday police found the car parked on the B6278, between Eggleston and Stanhope, sparking an extensive search in the area involving specially trained police and expert mountain rescue search teams.
Ms Hall is a keen long-distance runner, and a search on Friday concentrated on running trails she is known to frequently use between Eggleston and Hamsterley.
Chief inspector Dean Haythornthwaite, of Durham Constabulary, said police have become increasingly concerned for Ms Hall since she was reported missing on Tuesday “and have been exploring all lines of enquiry, including dozens from members of the public”.
Jenny Hall is a keen long-distance runner, and a search on Friday concentrated on running trails she is known to frequently use.
Police said more than 100 miles of track have already been covered in the Teesdale area alone with help from the rural community and local landowners, but officers are still appealing for any information that could help find the young woman.
