Mine is this 52 K "Big Lasso" most of it gravel and at the bottom section 8 K of pavement to "let her rip". Almost as flat as a pancake.
And for a bit of extra there is this one
A lot of hills on that to get to K 40 at the south end of Wood Lake (max. 12%),. but the downhills ......max. 14%. Now that's the fun, pedaling the uphills at close to 20 km/h isn't bad either.
I'll do that with my new e-MTB — actually it's a lot like my analog Devinci XC sport with 27.5x2.1" knobby tires — and shoot some Action Cam video now that all the gear is on the "beast".
Total distance 65 K or ~ 40 miles