The four Scenic loops in north Mississippi (32, 304, 315, and 333) start and end at I-55. All are well signed on both ends at I-55 and every turn along the way, but they are a mix of state and local maintenance. There is a separate section of state code that establishes the four scenic routes and authorizes signage (but not full state maintenance).
MS 32 Scenic starts at I-55(227), heads west on MS 32, then north on US 51 to CR 35, then follows CR 35 to Enid Lake. It leaves Enid Lake on CR 36 back to I-55(233).
MS 304 Scenic begins at I-55(271) and heads west on MS 306 to US 51. It follows US 51 south to Central Ave in Coldwater, then turns west on Central Ave which becomes Arkabutla Rd. It turns north on Arkabutla Dam Rd which becomes Pratt Rd, then turns north on "Hwy 301" to the 4 way stop at Old 304 and MS 301, then east following Old 304 and Commerce St back to I-55(280).
MS 315 Scenic starts at I-55(246) and follows MS 35 to Sardis Lake. It goes over Sardis Dam as shown in the browser, then follows MS 315 west back to I-55(252)
MS 333 Scenic starts at I-55(206) and heads east on MS 8 before splitting to head to Grenada Lake and MS 7. It is cosigned with MS 7 back to I-55(211).
Hope this helps.