Hi,
Some problems with relation 17427562 - Central Creek Linear Reserve / grass

First the relation inner way touches an outer way .. that brakes 'the rules' for multipolygon relations. 

And then why use a relation at all? Simply tag the outer ways with grass and be done. 

Then the issue is the name 'Central Creek Linear Reserve' .. this suggests a leisure=nature_reserve - independent of the land cover of grass ... I think it would include the trees? 

What do you think? 