I have put together a combination of lanes for lake Fork. It is color coded between SRA, Guide Lanes and High Caution Lanes. The issue is it when formated to GPX file it comes out as 76 different trails. Needing help with combining the trails into less as my Garmin unit will only store 50 trails.

Combining or merging all tracks into one track requires tracks to support track-segmentation. Lowrance, Hummingbird & Google Earth support this, sadly Garmin does not.

Track-segmentation is a long time GPX standard. Please call Garmin Support to pressure Garmin to support track-segmentation.

Sadly at this time , your SOL for track-segments.

Now, if your assortment of tracks are connected, you can create 1 track by tracing and retracing back on each leg.

What Little Gazoo said.
Are all 76 trails for one lake? If you have trails for different lakes, you could separate your waypoints and tracks by individual lake. Hopefully that would put you under 50 trails for each lake. When you go to a different lake, delete everything off your unit then just load the data for that lake.

It's 76 trails for Fork...I have contacted Garmin support already and also asked Todd Driscoll to try and help with this as well.

Tell Todd HI. We go back to Phoenix and Shipp's Marine in Gladewater.

Todd and I first discussed Garmin track-segmentation support 3-4 years ago.

But as some say, a squeaking wheel gets the grease.