A comet called 13P/Olbers will be visible in the sky on June 30th. It's expected to reach its peak brightness on that day and remain visible throughout July, according to Gunlock State Park on Facebook. This short-period comet will be closest to the sun (perihelion) on June 30th and is best viewed with binoculars or a telescope, especially in the western sky about two hours after sunset, according to Gunlock State Park on Facebook. 

Here's a more detailed breakdown:

Comet: 13P/Olbers is a short-period comet. 

Visibility: It will be most visible on June 30th, reaching peak brightness, and remain relatively bright throughout July. 

Viewing: Binoculars or a telescope are recommended, according to Gunlock State Park on Facebook. 

Timing: Look towards the western sky about two hours after sunset. 

Location: It will be a few degrees above the horizon, near where the sun sets.