DETERMINE ADA ACCESS
At least one ground-level slide must be on an accessible route. The slide exit area must have resilient surfacing, but the top of the slide does not. An ADA transfer platform is not required, but it would be helpful.
The adjacent slope may be used as an accessible route. It is generally considered a ground-level accessible route, which means it must be 60 inches wide but may narrow to 36 inches around features.
Grass, logs, steps, and handholds can be placed on the adjacent slope without requiring impact-attenuating surfacing or use zones. However, step forms, hop rocks, or half rubber balls generally require use zones and impact-attenuating surfacing.
There is some ambiguity around ASTM and ADA standards on the slope itself. It may be worth consulting a local expert.