Took the seg to Filoli Garden for Father's Day; used a 2-for-1 groupon deal. Had a great time; was able to access 90+% of the grounds. My son helped me walk it up a couple of steps, and it went well. I would guess you could see 98% of everything if you were patient, Some paths are pea gravel paved with minor slope. There are a good amount of benches to rest.
Their visitor map even shows a wheelchair friendly route to tour and they suggested that route. The gravel path is not on that route and the seg opened a lot of trail. Toured the house, too.
The docents were very nice.
Many of the older guests told me I had the 'right idea to get around'.
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