It looks like Little Ridge, Avalon and Collin Park are the last open ramps.
The latest ramp info from
http://swf67.swf-wc.usace.army.mil/lavon/Facility Closure Report:
Lakeland Park boat ramp is closed due to low lake level.
Mallard Park is closed due to low lake level.
Pebble Beach is closed due to low lake level.
Elm Creek is closed due to low lake level.
Highland Park is closed due to low lake level.
Bratonia Park is closed due to low lake level.
Twin Groves Park is closed due to low lake level.
Brockdale boat ramp is closed due to low lake level.
Lavonia North & South boat ramps are closed due to low lake level.
Clearlake North & South boat ramps are closed due to low lake level.
East Fork Marina boat ramp is closed due to low lake level.
Tickey Creek boat ramp is closed due to low lake level.
Caddo Park is closed until further notice.
If you need further information, please call Lavon Lake HQ at (972)442-3141. Thank you.