Mount Sterling to Bowling Green via I-64 W and Louie B. Nunn Cumberland Parkway — Mount Sterling to Bowling Green; depart around 6:00 AM for the roughly 3-hour drive, allowing time for traffic and parking at the museum.
National Corvette Museum — Bowling Green; explore Corvette history, rare cars, and exhibits, with a morning visit of about 2 hours.
Lost River Cave — Bowling Green; take an underground boat tour and walk the surrounding park, allowing approximately 1.5–2 hours. Reserve ahead for tour availability.
OZ. Restaurant — Downtown Bowling Green; enjoy a sit-down lunch featuring Southern and American dishes, about $15–30 per person, for roughly 1 hour.
Mammoth Cave National Park — Mammoth Cave; join a ranger-guided cave tour if available, or visit the visitor center and enjoy a short surface trail, allowing 2–3 hours. Advance reservations are strongly recommended for cave tours.
Buc-ee’s Smiths Grove — Smiths Grove, near I-65; stop for fuel, snacks, and a quick dinner before heading home, allowing 30–45 minutes.
Return to Mount Sterling via I-65 N, Bluegrass Parkway, and I-64 E — depart Smiths Grove around 6:30–7:00 PM for the approximately 3.5-hour return drive; refuel before leaving and expect a late arrival.
Leave Mount Sterling around 6:00 AM for the roughly three-hour drive to Bowling Green, taking I-64 W and then the Louie B. Nunn Cumberland Parkway. Grab coffee and breakfast before leaving or make a quick stop along the parkway; this is a long, tightly timed day, so arriving at the National Corvette Museum near opening is important. Parking is free on-site, and admission is generally about $20–$25 for adults. Allow around two hours to see the racing exhibits, “Corvette Cave In” displays, and rotating collections without rushing.
From the museum, drive about 15 minutes to Lost River Cave. Reserve the underground boat tour ahead—availability can be limited, especially on summer weekends—and wear comfortable shoes for the uneven, sometimes damp cave environment. Plan 1½–2 hours for the boat ride and a short walk through the surrounding park. Then head into downtown Bowling Green for lunch at OZ. Restaurant, where Southern and American dishes typically run about $15–$30 per person. Give yourself roughly an hour; parking downtown is usually available in nearby public lots or on the street, but allow a few minutes to walk.
After lunch, drive about 45 minutes north to Mammoth Cave National Park. Cave tours depart from the visitor-center area and require advance reservations; arrive at least 30 minutes early because some tours involve a shuttle and a fair amount of walking, stairs, or tight passages. If no suitable tour remains, use the visitor center and a short surface trail as a backup, but do not count on seeing the cave interiors without a ticket. In late August, carry water and expect heat and humidity above ground even though the cave itself is cool.
Leave Mammoth Cave National Park in time to reach Buc-ee’s Smiths Grove around 6:30–7:00 PM. Use the stop for fuel, barbecue or sandwiches, snacks, and a quick dinner—30–45 minutes is enough, though the store is famously easy to linger in. From there, return to Mount Sterling via I-65 N, Bluegrass Parkway, and I-64 E. The drive is approximately 3½ hours, so expect a late arrival; fill the tank before leaving Buc-ee’s, and consider one brief rest stop on the way home rather than trying to push through tired.