Calculating distance on the river.

Hey all. What's a good way to calculate how far a trip on the river will be? It's not like Google maps will plot a course along the river and give me a distance. Any other apps or tools for this?

Saw a kayak on utube the guy went from lavon damn to lake ray hubbard he add some kind of app show distanced traveled and distanced left ill look for link

https://www.youtube.com/watch?v=pv00xrhkrGg maybe that will help

Use the scale at the bottom of a map...

Google earth. You can plot your exact path and pick miles, feet, whatever.

+1. Quick and accurate.

https://www.freemaptools.com/measure-distance.htm

Yes I remember those days of Thomas Guides and folded maps with the black and white bar scales in the legend. We've come too far to revert back to that...

Thanks everyone. I'll try Google earth. Last I checked there was no mobile app though.

The last trip I put in on the Guadalupe at the I35 ramp and went down to the dam on "Lake" Dunlap. Not knowing how far it actually was... mistakes were made. Don't wanna do that again.

Navionics Chart Viewer

On google maps you can measure distance and then just click a bunch of waypoints to follow the curves of the river.

Google Earth will do it

Google maps.
Drop a pin
Click on the dropped pin.
Click on measure distance.
Click on add a point.
Add as many points as you like.

This. Can do same on Bing maps.