Is the lake at six flags Arlington,open to public fishing?

No it is not open to public fishing.

,It was open to public fishing in 1991 I read it in ARL paper, off I went,caught cpl bass security came said no fishing,showed me sign,I explained newspaper said etc he said leave. Went next night same outcome,then no problems for over a year. So fast forwardc

Not that I know of!!!

It is not.

I am not sure either. I don't fish so not sure

Check with Parks and wildlife

Not sure, maybe Six flags can answer that.