I have been trying to figure out how to create a course on a map and upload / download it onto my Forerunner 305 so that I can navigate following the predefined course. Its taken awhile to find it, but it exists! Check out www.mapmyrun.com! Create the course using a google maps interface and then save it as a ..CRS which can be imported / loaded into the Garmin Training Center software, and from here it can be exported to your 305.
This works great for planning long runs / or bike rides.
Quoted message said:
From the Motionbased online survey, it appears that they are
considering adding a Course Creator functionality which would be similar to this, which would be nice if done properly.
Can't you just use the included Course Creator and ride the course and record it? Or is it in an area that you aren't nearby and you are trying to recreate it for an upcoming race?