The Big Day out In Peacehaven attracted 500 visitors to Piddinghoe Sports Park on Saturday July 19.
Despite the weather warnings people turned out in their droves to enjoy cycling and celebrate the South Downs National Park.
The event was organised in advance of work beginning on the Big Parks Project.
Event organiser Michelle Porter said: “Despite the severe weather warnings, the people of Peacehaven came out and really showed an eager enthusiasm for the new park.
“The day was all about encouraging people to enjoy the natural beauty that surrounds the Park, whether on foot or by bike and it is clear that the cycling bug has certainly hit Peacehaven.
“Over the next few months we will be running follow up guided rides and walks for those who missed the opportunity or simply want another go.
“If you don’t have a bike we will have So Sussex on hand again with their pop up bike hire.”
The day began with the arrival of bike trains from local schools led by Lucy and Mike from sustainable transport charity Sustrans.
Visitors were then given the chance to join the cycle party led by Cycle Seahaven to cycle off road on the South Downs.
Others took the option to go on a butterfly hunt with a park ranger or quench their thirst with a smoothie created by the Sustrans smoothie bike.
The Big Day Out was attended by many cycling enthusiasts of all ages and there were two bike doctors on hand to give free bike MOTs and maintenance.
The police marked bikes and taught children about cycle security.
There was an incredible display of skill and daring with THINKBIKE! BMX stunt team.
Michelle added: “We were thrilled that the sun came out for the free picnic organised by local group Space at the Table and that they were able to eat alfresco with picnic blankets donated by a local Quaker group.
“After lunch the children were treated to a free face painting session before joining the bike train home or simply riding their bikes on the grass.”