Not sure if there is an updated map on line or not. I have had a difficult time getting the TC bike map to come up. My best suggestion is follow the Greenway to where it goes under Lake Street, there is a right hand turn there, that will take you up to Cedar Lake, cross the road and follow it to I think it's 21st or 23rd, where the old bare a55 beach used to be, that continues up to where there is a "Y" left you can go out through St Louis Park and down along 169 to Hopkins, or right you'll hit down town Minneapolis, and know where the trail starts.
The "Hopkins Loop" I like to call it is like 15-17 miles.