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The events - at Chatsworth House and Windsor Great park - are aimed at a wide audience, says Ennis- Hill; "mum's with the buggies, families, serious runners and people who have never put on trainers before."
"I've seen the benefits you have from being active and being healthy," she adds.
"So for me it's about communicating my experiences about keeping fit with the general public - to help people take those first steps to being more active than they already are and finding a way into sport."
Find out how anyone can get involved with just about any sport with our special guides.

"I wouldn't say I'm tough...just lucky", said Reg Foggerdy who disappeared last month while hunting a feral camel in Western Australia.
Police trackers found him sitting under a tree on 12 October, around 15km (9 miles) from where he went missing.
A diabetic who recently had a heart attack, he said he had given up hope.
"I've heard of people dying after three days with no water, I don't know why I survived six days," he told 7News.
"There was a piece of me that wanted to lie there and pass away. I was thinking of my family who would see me laying there."
Wearing only a T-shirt, shorts, a cap and flip-flops, Mr Foggerdy became disorientated in the fierce heat of the desert after chasing the camel.
He said he poked a stick into an ants nest and ate the insects for nutrition, a tactic he said he learnt from British survival expert Bear Grylls.
"They tasted quite good. On the first day I had about 12 and on the second day about 18. If they want to call me ant man I don't care," he said.
The retired miner said he spotted police search helicopters several times, mustered all his energy to wave his hat at the sky, but rescuers could not see him.
In the end, a local Aboriginal man provided police with the vital clue - Mr Foggerdy's slipper print.
After coming so close to death, he says that he has a new lease on life.
But asked whether he would return to the site of his ordeal he replied: "I might go back and look for me gun".

The 19-year-old was taken off in the 15th minute at Vitality Stadium after appearing to pick up the foot injury.
City said in a statement: "He will undergo further examinations in the coming days to establish the extent of his layoff."
The Brazil international, who completed a £27m from Palmeiras in January, has played five times for City.
Jesus was hoping to become the third City player to find the net on each of his first three Premier League starts, having scored at West Ham and two against Swansea.
The other two players to have achieved that feat are former striker Emmanuel Adebayor and and current midfielder Kevin de Bruyne.
Metatarsals are the five long bones in the forefoot which connect the ankle bones to those of the toes.
The first is linked to the big toe and the fifth, on the outer foot, links to the little toe.
Together, the five metatarsals act as a unit to help share the load of the body, and they move position to cope with uneven ground.
Injuries usually occur as a result of a direct blow to the foot, a twisting injury or over-use.
Medical experts recommend rest with no exercise and sport for four to eight weeks.
The patient might be asked to wear walking boots or stiff-soled shoes to protect the injury while it heals.
If the cause is over-use, then treatment can vary hugely. Training habits, equipment used and athletic technique should all be investigated.
It all depends on the damage and which metatarsal bone is involved. It is impossible to put a timescale on recovery from a stress injury.
With an impact fracture, after the plaster and protective boot is not needed (usually after four to six weeks), it will be a case of exercise and increasing weight-bearing activities.
Ice packs, strapping and even the use of oxygen tents can be used to assist recovery.
Full return to action can be anything from another four weeks and upwards - depending on the extent of initial damage. Young bones heal quicker.
Jessica Ennis-Hill wants to help people be more active and find a way into sport - starting with two fun days combining music and running.
[NEXT_CONCEPT]
A 62-year-old Australian man, who says he survived without water by eating ants while lost in the Outback for six days, has spoken of his ordeal.
[NEXT_CONCEPT]
Manchester City forward Gabriel Jesus broke a metatarsal in Monday's 2-0 Premier League win at Bournemouth.