The crater was formed approximately 20,000 to 80,000 years ago during the most recent phase of regional volcanic activity.
Lalgambuk is categorized as a scoria cone volcano, typical of the Newer Volcanics Province in Victoria.
The site was historically used as a health sanatorium in the early 20th century, utilizing the local climate and mineral-rich environment.
The Dja Dja Wurrung people refer to the mountain as Lalgambuk, which is central to their cultural landscape.
Mount Franklin Reserve is built within the perfectly circular, grassy crater of the dormant Lalgambuk volcano. The reserve functions as a public camping and picnic site situated at an elevation of 600 meters above sea level. Native flora, including manna gums and blackwoods, populate the inner crater walls and slopes. It serves as a significant site for the Dja Dja Wurrung people, who know the peak as Lalgambuk. The crater floor offers level ground suitable for tents, while the elevated rim provides expansive views of the surrounding Victorian volcanic plains. Facilities are limited to basic fire pits and picnic tables, maintaining a rugged, natural aesthetic.
The highest point on the southern rim for a panoramic view looking down into the symmetrical crater basin.
Bring your own drinking water as there are no reliable taps or potable water sources on-site.
Pack adequate firewood if you plan to use the fire pits, as gathering wood within the reserve is prohibited.
Mobile reception is inconsistent within the crater bowl; download offline maps before arrival.
Attempting to drive heavy caravans to the base, as access roads can be narrow and challenging for large vehicles.
The site may be closed periodically during days of extreme fire danger; check local fire warnings before departure.
Strict 'leave no trace' policy; all waste must be carried out. No pets allowed.