I saw somewhere there is a shuttle. Where does this pick up and let off and how long does it take? We want to hike the trail that connects the upper and lower falls, but only want to go one way. Is this what the shuttle is for?

The shuttle service is in the parking lots of the lower and upper falls. They have a time schedule that they do pick ups from each location. It is a 4 mile hike along the river .It takes 2.5 to 3 hours depending on what you want to stop and see. It's a very enjoyable hike. It is a one way hike.

From their website: Tahquamenon Falls State Park Hiker Shuttle Between Upper and Lower Falls For Canoers, Kayakers, and Hikers! Our 2017 Season has concluded Our 2018 season will start Memorial Day Weekend Dates: June 1-3 June 8-10 Daily June 15-Labor Day Fridays, Saturday, and Sundays in September through Harvest Fest.    RATES (Subject to change) $17 FIRST ADULT IN PARTY $3 EACH ADDITIONAL ADULT IN PARTY CLEAN, DRY, WELL MANNERED CHILDREN & DOGS RIDE FOR FREE NO RESERVATION NEEDED! JUST WALK UP AND PAY THE DRIVER! (We seat the drivers for each hiking party first, if there is room, we’ll seat the rest based on space and need)

There is a shuttle service but hiking it is the best way to go

Yes, it runs from upper to lower, several$ a person, probably would haul you ether way. Definitely make sure you're in shape and have a good pair of shoes.

Shuttle starts in june. Its closed for the season. Can confirm was there a week ago. The trail is currently only navigable using cross country skis or snow shoes. Otherwise i'd say its too rugged

We have been there twice. Once in the summer and once in the winter to see frozen falls. Did not see any shuttle service.

When i was there in July 17 there was no shuttle to connect the upper and lower falls. The only shuttle we saw was for the kayak rentals.