Where could I park my bike? I prefer a place that's secure & not where it can get stolen via chain cutters. Edit: thanks, y'all. I plan on biking the Katy Trail EastBound someday & plan on visiting the arch once I reach Machens.

Outside the building. There's a police force on the premises and cameras everywhere

Was going ro say the same thing, there is a bike rack between the arch and old courthouse, on the northside, has a camera pointed at it

There is a bike rack nearby and significant law enforcement presence.