How long do you need?

See devices for 25M cables or above. At deep color and 2.7Gbps.

See this link http://www.datasheetarchive.com/PI3HDMI101-B/Datasheets-SW17/DSASW00325203.html

For even longer, you might need to consider something else such as ethernet cable, co-ax cable etc.

In fact, flat old s-video over coax can reach very long.