A decision on whether to press ahead with plans to seek World Heritage Status for the Lake District is likely to be made on Friday.
The area has been trying for World Heritage status since 1985
A meeting of interested parties dubbed a "make your mind up" event was taking place at Wray Castle, near Windermere.
The Lake District National Park Authority (LDNPA) has been trying since 1985 to win United Nations approval.
However, some organisations, including Cumbria County Council, have expressed reservations about the plan.
The LDNPA believes it will cost at least £350,000 to fund an application.
It says World Heritage Status could bring increased international recognition for the Lake District, attract more tourism and help protect traditional farming.
But, it also acknowledges that it is likely to mean unwelcome planning constraints, increased bureaucracy and a negative effect on tourism in neighbouring areas.
Friday's meeting was being attended by civic, business and tourism leaders.
Cumbria County Council, which is being asked to support the bid with a donation of about £50,000, said it remained to be convinced that the plan would benefit the area.
Council leader Tim Stoddard, said it remained unclear how World Heritage Status would benefit Cumbria's environment, economy or services to the community.
He also expressed concerns that the initial cash backing of £50,000 could escalate.