Diamond Lake and Rocky Mountain - lake, lookouts and a summit over Lake Wanaka; a quieter Roys Peak alternative

The line through Otago, New Zealand - waypoints, elevation and the day-by-day shape of the walk.
Year-round (best spring-autumn)
Sun and wind; winter ice up top
Open year-round; can be hot and exposed. Confirm.
Lakeside path and a small rocky summit with lookouts
Non-technical walking/hiking; confirm any exposed or scrambly sections locally
Marked/waymarked route; navigation generally straightforward - carry a map and confirm locally
Suitable for reasonably fit hikers; not wheelchair accessible - confirm specifics
Popular but quieter than Roys
Diamond Lake loop only (easy); add the Rocky Mountain summit
Diamond Lake car park, Mt Aspiring Rd
Out-and-back/loop - no shuttle needed
Day route - none needed
Day-hike kit, water, sun/rain protection, sturdy footwear; coverage varies
Services in Wanaka; limited or none on the trail
Not required; self-guided
No permit; near Wanaka
Permits and operators change - confirm before booking.
Sun, some steep steps, rocky lookouts
Retrace the route to exit; dial local emergency services; carry a means of calling for help where remote
This profile is desk research, compiled from public sources - not a first-hand trail report. Coordinates are approximate.