Member Link Up Maryland shooters

There isn’t a range that I am aware of in Maryland that goes to 700 yards. 500-600 yards is the farthest I have found.

Not sure where you are in Maryland, but here are a few that offer at least 500 yards.

Delmarva Sporting Clays - 500 yards
Alexander Sporting Farm - 600 yards

I drive outta state to shoot.

Peacemaker National and Mifflin County Sportsman have what you really want, just be prepared to drive.
 
bridgeville in delaware https://brpc-de.com/
would be the only 1k range that i know of In the md area besides the https://quanticoshootingclub.com/
if you don't mind driving into pa there are a few other ranges including new holland https://www.nhrpc.org/
and another near gap pa think they are out to 600 maybe more not sure i just can't remember there name . or way north they have https://www.facebook.com/pages/Mifflin-County-Sportsmens-Association/117390431655082 that's out to 1k
 
My niece and her husband belong to Peacemaker. Public is limited to the 300 yard range. Members have access to the 1000, after qualifying in front of an RO.
Membership is full up at this time, with a waiting list.