It's the other way around -- Elgin & Belvidere. The E&B right-of-way is very much intact between Huntley and Belvidere.
It's been built up somewhat in Huntley and isn't immediately apparent, but it's still visible. The Illinois Railway Museum owns the right-of-way between Coyne Station Road at the west edge of Huntley and the Kishwaukee River, but does not currently have track in this area. The museum operates track on the E&B right-of-way between the west bank of the Kishwaukee River and Jefferson Street in Union. (Note, however, that the track on which IRM operates is not original E&B track.)
Through Union the E&B ran on the street, but the right-of-way becomes visible again on the west side of town. Look for the pole line a bit south of the C&NW track. It gets a little hard to follow through Marengo, although there was some E&B track still in existence until recently. If I'm not mistaken, it was torn out not long ago.
The right-of-way becomes easily visible west of Marengo. In Garden Prairie it is easy to picture the E&B running down the street a block north of US 20. Between the west edge of Garden Prairie and the southerly curve in US 20 east of Logan Avenue, the right-of-way is exceptionally apparent along the north side of the highway. In Belvidere running was mostly on the streets, so there's not a lot to see.