Recreation facilities, services, programs, and activities offered by both public entities (state and local government) and private businesses are required to be accessible to people with disabilities. Compliance responsibilities are outlined below.  

Facility and Built Environment Accessibility

Recreation facilities are required to follow the 2010 ADA Standards for Accessible Design.  These standards went into effect on March 12, 2012, and apply to new construction, alterations, and renovations. 
Along with general features such as parking lots, entrances, accessible routes, and bathrooms; standards for specific recreational features are included in the 2010 ADA Standards.
These are:
Guide on Amusement Rides-Access Board

Guide on Boating Facilities-Access Board

Guide on Fishing Piers and Platforms-Access Board

Guide on Golf Courses-Access Board

Guide on Miniature Golf (Access Board)

Guide on Play Areas (Access Board)

Guide on Sports Facilities-Access Board

Guide on Swimming Pools, Wading Pools, and Spas-Access Board

Outdoor Developed Areas: Summary of Accessibility Standards for Federal Outdoor Developed Areas

Surfacing the Accessible Playground-Access Board

Recreation Program Access and Public Entities

For more information about program access obligations, visit the Great Plains ADA Center's article Recreation and Program Access.

Recreation Business and Readily Achievable Barrier Removal

Private businesses with recreational facilities such as hotels and gyms are required to follow the  2010 ADA Standards for Accessible Design. Existing facilities, however, (those built before the passage of the ADA in 1990) are only required to make the changes needed to meet the 2010 ADA Standards that are "readily achievable". That means changes that are relatively inexpensive and easy to do based on the business's resources.   Obviously, a large chain of fitness centers will have more money to update their facilities than a small business.  Visit Readily Achievable and Small Business.