There's a desire path across the BNSF Midway Subdivision connecting Hamline Ave in Como to Energy Park. Hard to see on Google Maps, but it's there. Because otherwise it's a mile between bridges at Snelling and Lexington.
That's the St. Paul Subdivision, but yeah, there's usually
a path there. I think the fence on the Bandana Square side got repaired late last year to fix the hole and block the path, so I'm not sure of the current status.
There are multiple desire paths across those tracks. Here's
one at Energy Park Drive and the UMN Transitway connecting to Langford Park. There used to be a roadway underpass there decades ago.
Another path crosses the tracks
right by Snelling Ave, going from the Oscar Johnson Arena up to the Snelling service road.
Along Energy Park Drive itself, there's a pronounced
line where there should be a sidewalk -- not exactly a "desire line", but shows that there's a decent amount of foot traffic. That will probably fade a lot now that the Saints will be playing in Lowertown instead.
There are some decent desire lines
by Guitar Center in Roseville. Also a "desire sidewalk" just southeast of there along the north side of County B2 between the sets of Snelling on/off ramps.