An inquest heard last week that Kathryn Townend, aged 59, met relatives from around the country and visited the reservoir before deciding to go to the nearby Knockerdown Inn.
But, as Mrs Townend crossed the Wirksworth to Ashbourne road near the pub with her daughter Sharon, she was in collision with a Suzuki 1100cc bike and suffered multiple injuries.
She died at the scene of the May 2 crash and motorcyclist Mark Capewell, who went on to collide with a tree, suffered severe injuries described by Pc Rachel Baggaley as "likely to be life-changing".
Crash witness Jonathan Barnhill told the Chesterfield inquest he was heading back to Nottingham at 3.30pm after visiting the reservoir with his children.
The off-duty policeman was driving towards the brow of a hill just beyond the Knockerdown when he saw two motorcycles approaching at speed.
"The first bike passed me very, very quickly and the second even faster, as if they were racing each other or the second bike was trying to overtake the first.
"Their speed surprised or shocked me and I looked in my rear view mirror and saw one of them strike a lady approximately in the middle of the road. The bike went into the air and cartwheeled out of view," said Mr Barnhill, who stopped and went to help the crash victims.
Knockerdown landlord Keith Fitzsimmons told police he saw the collision while looking out of his upstairs lounge window at customers in the beer garden.
"I saw a female stood in the middle of the main road and a motorcycle hit her full on. I didn't hear any screeching of brakes. Another female was reaching the grass verge on the pub side of the road.
"I personally didn't think the bike was speeding. I immediately dialled 999 and ran outside to help," stated Mr Fitzsimmons.
Pc Baggaley said the collision occurred behind Mrs Townend's daughter, who did not see the impact and was still "extremely fraught" about the incident.
Mr Capewell, of Burton-on-Trent, was taken to a Nottingham hospital intensive care unit by air ambulance. Police were unable to speak to him for two months and he could not remember what happened. Fellow biker Martin Barks was riding ahead of Mr Capewell and did not see the crash.
Police accident investigator Janet Garner said Mrs Townend was crossing from Mr Capewell's right when the collision took place on his side of the road. Pc Garner was unable to estimate the bike's speed prior to impact and could find no evidence at the scene that Mr Capewell had exceeded the 60mph limit.
North Derbyshire Coroner Tom Kelly recorded an accidental death verdict on Mrs Townend, a residential health care worker, of Wood End, near Tamworth, Warwickshire.