Richard from Washington on 7/31/2018 12:06:48 PM:
I rode the Edwards Ferry to Seneca section last weekend. There were lots of mud holes. I had a mountain bike and went right through them although the bike slewed a bit. But I saw people with what I'd guess were 25 mm tires going through the mud holes too. The path beneath an inch or so of mud and water seemed firm, so unless there are torrential rains in September, I'd think you'd be okay.