Jason Arunn Murugesu
BBC News, North East and Cumbria
Family handout
Jenny Hall was past seen leaving her location connected Tuesday afternoon
The hunt for a missing pistillate has entered its 4th day, constabulary person said.
Jenny Hall, 23, was past seen leaving her location astatine Barracks Farm, Tow Law, County Durham, connected Tuesday conscionable aft 15:00 GMT. Her reddish Ford Focus was recovered parked connected the B6278 betwixt Eggleston and Stanhope connected Wednesday.
Ms Hall, a keen long-distance runner, is described arsenic 6ft (1.8m) gangly with precise agelong acheronian hairsbreadth and was past seen wearing a bluish hoodie with a John Deere logo and acheronian jogging bottoms.
Durham Police said it would beryllium moving successful Hamsterley Forest, wherever Ms Hall was known to run, and the surrounding areas.
Hamsterley Forest was created by Forestry England successful the 1920s.
Sections are utilized for lumber production, but the country is besides fashionable with walkers and cyclists.
Spanning 4,942 acres (2,000ha), it is the largest woodland successful County Durham and is located astir 16 miles (26km) from the municipality Ms Hall is from.
It attracts astir 200,000 visitors a year, according to Forestry England.
Ch Insp Haythornthwaite said helium wanted to convey those who had contacted them with accusation truthful far.
"We truly bash admit your assistance and support," helium said.
He said the unit was alert that families would beryllium walking astir the wood recreationally contiguous and asked them to springiness abstraction to officers conducting the search.
"Try not to disrupt the hunt area," helium said.
The hunt is present focused connected the moving trails Ms Hall often uses
Alongside the police, Teesdale and Weardale Search and Mountain Rescue Team (TWSMRT) said its teams had truthful acold searched implicit 60 miles (96.5km) of paths and tracks successful Hamsterley Forest.
"The biggest situation is the country size itself and the terrain," said unpaid Peter Bell. "The terrain is muddy and boggy."
A spokesperson for TWSMRT antecedently thanked the nationalist for offers of help, but individuals were advised not to effort and assistance arsenic it could "hamper the systematic search".
TWSMRT
Mountain rescue teams searched the moorland connected Wednesday and Thursday
Motorbike officers, specialised sniffer dogs and aerial enactment drones person besides been progressive successful the hunt truthful far.
Durham Police is urging anyone with immoderate accusation to ringing 999.