The Lorenzo Boat Access is the gateway to one of eastern Idaho's most beloved stretches of fly-fishing and floating water, a BLM river access on the South Fork of the Snake River just north of Rigby. While it's easy to think of it as simply a boat ramp, it's really the head of the famous "Lorenzo to Menan" run, the lowest reach of the South Fork that local anglers know as Section 5, and for drift-boaters, rafters, kayakers and anglers it's one of the key put-ins on a genuinely legendary river.

The float from here is the reason to come. From the Lorenzo ramp, just west of the U.S. Highway 20 bridge, the South Fork winds down to the takeout at Menan, near the river's confluence with the fabled Henry's Fork, a mellow, scenic reach through cottonwood bottoms and braided channels that's popular with fly anglers chasing the South Fork's renowned trout and with paddlers looking for an easygoing float. This access sits about 53.7 river miles below Palisades Dam, at the tail of the whole South Fork system.

The site itself is a well-kept BLM river access with a concrete boat ramp, day-use only with no overnight camping. Facilities are basic but useful: toilets, some shade and trash cans, but no drinking water. Users are required to fill out a self-issue permit and pay a small parking fee (around $3), a standard public-land access charge rather than a private gate.

Finding it takes a moment of navigation: take exit 325 toward Menan off Highway 20, head west about two-tenths of a mile, and turn onto the dead-end road heading back toward the highway; the first road on the left is the Lorenzo access road, a long gravel road running north alongside a stone sound-barrier wall.

The South Fork is a powerful, cold river, and the usual river cautions apply: wear a life jacket, know your craft and the reach before you launch, and check flows, since dam releases and season change the character of the water. Summer and early fall are prime for floating and fishing this lower reach, while spring runs high and cold.

Come with a fishing license for this blue-ribbon water, a life jacket, your self-issue permit and parking fee, sun protection for the open river, and a shuttle plan for the Lorenzo-to-Menan run. Whether you're launching a drift boat for a day of South Fork trout or putting in a kayak for an easy float toward the Henry's Fork, the Lorenzo access is the doorway to a classic eastern Idaho river day.