the 3 place of worship pois here: node/358851525, way/475569533, way/475569532 should be verified for names if they have changed and if they are even still actively located here. There is a church in one of the buildings so at least names could be added and any duplicate tags could be removed. Some cleanup is needed.

pretty sure there is a building here via imagery just unclear if its a water tank or something

airstrip for airport poi here is not visible on imagery, perhaps its no longer here? verification needed

dam has two dup pois as points suggest only keeping one

suggest tagging Burns Creek water poly here as intermittent=yes as its not always full and is seasonal

suggest tagging Bear Reservoir as intermittent=yes as its not always full and is seasonal

Currently the area for Camp Mather resort: way/416229165 overlaps this section of land where the Evergreen Lodge is located. Per parcel tax maps of the area: https://www.tuolumnecounty.ca.gov/385/GIS it does seem that Evergreen Lodge may not be part of Camp Mather and instead the boundary for Camp Mather should be updated to only extend as far south as the path here: way/423200533 and the stair step area south of the path should instead have a new area created just for the resort at Evergreen Lodge.

there are more cross country piste trails that are missing that can be added here via: https://www.mammothmountain.com/winter-activities/cross-country-skiing/tamarack-trail-status-conditions

should add winter_service=no to this section of Old Mammoth Road as its closed to vehicles in the winter when snow is not removed. Its unclear where the actual closure gates start and end though.