I know this is a long shot but I’ll give it a go. Older mid 50s Triathlete who is slower in the water but faster on land looking for a swim buddy for a couple early morning swims per week at the Green River Reservoir. It’s a paradise for swimming as it’s clean, big and no motorboats allowed. My old swim buddies have moved on to pickleball or have different life schedules now. Looking at a 6am swim start to get back to my remote office to start work around 8am. I’m a 30 min drive from the Green River res. PM me if you live nearby and interested. I am a 40 min 70.3 swimmer and best IM swim was 1 hr 17 mins. Not fast but not terrible either.
Replying as a matter of esprit de corps – I am in Illinois and cannot join you: I did recently have occasion to swim alone in Lake Michigan and, as a dad with a job, wanted some safety and comfort. I got a swim buoy – quickly in- deflatable, incredibly easy to transport, and with buoyancy as forceful (? I do not know what the physics term would be) as a large beach ball. I got a large “Restube” brand pro size.
Of course I cannot recommend swimming alone :-).