The Canberra Centennial Trail consists of seven sections. This multi covers half of the 4th section from Hall to John Knight Memorial Park (10.5 kilometers). It is one of a series of 14 muli caches covering the whole of the trail. By the time you have completed the series you will have walked or biked at least 145 kilometres, potentially double that,
https://www.environment.act.gov.au/parks-conservation/parks-and-reserves/find-a-park/rural/canberra-centenary-trail
Collect the information at each of the waypoints in any order:
Then X = A + B + C + D + E + F + G + H + I + J + K + L + M + N + O + P + Q
GZ = S35 (X - 19192)/1000 E149 (X - 25748)/1000
Checksums: X = 21, S = 25, E = 27
Suggested route: Park at John Knight Memorial Park, and bike to Hall (generally uphill) collecting the waypoints, then return the way you came (generally downhill). Most of the route is on a sealed cycle path, however between Hall and Cold Creek it is more suitable for mountain bikes or walking.
Remember to keep all your answers.
They will be needed to solve a mystery cache which will be published once all fourteen multis in this series have been found by several cachers.