Turtle Alley is a shallow lagoon wall dive inside Lady Musgrave's lagoon, entered directly from the Lady Musgrave HQ dive platform. A sandy bottom at 7-10 m is dotted with large bommies that act as cleaning stations for the lagoon's resident green, loggerhead and hawksbill turtles, and the vertical wall offers varied coral formations and nooks to explore. As the name suggests, turtles are the main attraction, and divers can expect to see several on a dive, resting or being cleaned.

White-tip reef sharks patrol the sand, and the reef is busy with chromis, damselfish, butterflyfish, Moorish idols and parrotfish. Hard coral colonies, particularly bushy finger corals, provide homes for the colourful residents. The operator notes that maintaining good buoyancy close to the wall minimises current exposure and maximises wildlife observation, which is sound advice for all lagoon dives: the wall shelters divers from any tidal flow, and slow movement keeps the turtles relaxed.

Turtle Alley suits beginners without certification diving with an instructor, snorkellers in good visibility, and experienced divers wanting a leisurely dive or a night dive during an overnight stay. It is sheltered and shallow, so it can be dived when the outer reef is too rough. Together with The Aquarium and Turtle Bommie, it is one of three closely related lagoon sites that make Lady Musgrave one of the most reliable turtle-diving destinations in Queensland.

Night dives here reveal sleeping turtles tucked against the bommies, hunting whitetips and crustaceans emerging from the coral, and are a highlight of an overnight stay on the pontoon.

Lady Musgrave Island is about 96 km north-east of Bundaberg and 59 km east of the Town of 1770. Lady Musgrave Experience departs 15-17 Marina Drive, Burnett Heads (15 minutes' drive from Bundaberg; parking at the marina) at about 7:30 am for a roughly 2-hour crossing to its pontoon in the lagoon; 1770 Reef Eco Tours leaves the 1770 Marina (free parking beside the marina cafe) for a roughly 90-minute run. Private vessels anchor inside the lagoon via the marked entrance channel through the reef.

Turtle Alley is inside the lagoon and entered directly from the Lady Musgrave HQ pontoon's dive platform.

The lagoon itself is diveable in almost any weather, but the crossing is open ocean and tours are cancelled when south-easterly trade winds exceed about 25 knots or the swell is over 2.5 m. Outer-reef drift sites are chosen by wind and tide: the northern and western edges shelter from south-easterlies, the southern ledges need light winds or northerlies. Currents strengthen on spring tides and the outer sites are run as drifts on either the flood or ebb.

Cyclone season is November-April; summer storms and plankton reduce visibility. Calmest seas are often September-November and March-April. Sheltered inside the lagoon; staying close to the wall minimises exposure to any tidal flow.

Enter from the Lady Musgrave HQ dive platform, descend onto the sand at 7-10 m and follow the lagoon wall with it on one shoulder, visiting the turtle cleaning stations on the larger bommies. Turn at half air, return along the wall slightly shallower and finish the safety stop beneath the pontoon.

Lady Musgrave Experience runs daily tours from Burnett Heads (Bundaberg) aboard Reef Empress to its Lady Musgrave HQ pontoon, with certified divers transferring to the dive tender Underworld for the 'Adventure Outer Reef Double Dive'; overnight stays on the pontoon allow extra and night dives. 1770 Reef Eco Tours also dives Lady Musgrave from the Town of 1770.