Public Trails Computed from official land records

Brisbane · Mayfly Gully

Mayfly Gully from Merewether Street

entry is a road 5 m of climb chain confidence Statutory inference — evidence class mayfly-gully--from-merewether-street

Access verdict · Lawful, with caveats · weakest evidence in the chain: statutory inference

A lawful approach from Merewether Street, with caveats.

The chain below runs entirely across land the public has an established right to be on. It is a legal line, not a path: nothing here has been surveyed on the ground.

What this verdict means · what the evidence grades mean

On-ground signage and temporary closures override this page. Always.

Getting to the start The trailhead coordinate, not the feature

The start is at -27.53759, 152.98747

That is Merewether Street, where the walk below begins — 4.0 km of it. Every link here goes to that coordinate and never to the feature itself, because a driving route to a waterfall is a driving route into the country above one.

-27.53759, 152.98747

An ordinary car reaches the start The roads layer marks the road reaching this point as trafficable by an ordinary vehicle.

The coordinate is where the recorded way begins, read off the same layers as the walk. What the record says about a vehicle is above, and it describes this point rather than the drive to it. Whether the road is sealed, gated, or open today, and where a car may lawfully be left, are none of them things these records say — so treat the last few kilometres as unresearched, and the mapping service's route to them as its own work, not ours.

The chain, leg by leg Computed from cadastral geometry; never walked

Legs of the computed corridor, in order, with the grade of the record that made each one lawful
# Runs along Parcel / reference Mapped along it Distance Bearing Evidence
1 Road reserve 244121 nothing mapped 183.1 m 15.7° NNE Official spatial — evidence class
2 Road reserve 248035 nothing mapped 210.7 m 95.4° E Official spatial — evidence class
3 Watercourse bed 247883 nothing mapped 36.9 m 170.3° S Statutory inference — evidence class
4 Watercourse bed 226071 nothing mapped 1028.1 m 185.0° S Statutory inference — evidence class
5 Watercourse bed 226109 nothing mapped 350.5 m 136.0° SE Statutory inference — evidence class
6 Watercourse bed 226147 nothing mapped 526.9 m 77.0° ENE Statutory inference — evidence class
7 Watercourse bed 4750844 nothing mapped 328.2 m 190.0° S Statutory inference — evidence class
8 Watercourse bed 4759014 nothing mapped 223.6 m 242.5° WSW Statutory inference — evidence class
9 Watercourse bed 4759090 nothing mapped 535.3 m 257.6° WSW Statutory inference — evidence class
10 Watercourse bed 4769122 nothing mapped 595.2 m 234.0° SW Statutory inference — evidence class
Total no way mapped 4018.5 m Chain confidence Statutory inference — evidence class

Every leg above is computed from cadastral geometry. Nobody has walked it, and no part of it is a path on the ground: it is the line along which the public record establishes a right to be. Where a leg names a way, that is what a managing authority has mapped down the same ground — it says nothing more about your right to be there, which the parcel already settled.

Caveats — what has to be said before walking this

  • Corner-point junction. Two parcels in the chain meet at a single survey point. They are legally continuous public land, but the junction has no width on the ground.
  • Watercourse crossing. The chain crosses a watercourse bed. The bed is State land by statutory inference, there is no structure, and the crossing is off in high flow.
  • Measured crossing. The narrowest gap between 248035 and 226071 is 23.16 m. There is no structure. Do not cross in high flow.
  • Measured crossing. The narrowest gap between 247883 and 226109 is 874.22 m. There is no structure. Do not cross in high flow.
  • Measured crossing. The narrowest gap between 226071 and 226147 is 43.04 m. There is no structure. Do not cross in high flow.
  • Measured crossing. The narrowest gap between 226109 and 4750844 is 278.14 m. There is no structure. Do not cross in high flow.
  • Measured crossing. The narrowest gap between 226147 and 4759014 is 314.71 m. There is no structure. Do not cross in high flow.
  • Measured crossing. The narrowest gap between 4750844 and 4759090 is 0.00 m. There is no structure. Do not cross in high flow.
  • Measured crossing. The narrowest gap between 4759014 and 4769122 is 362.16 m. There is no structure. Do not cross in high flow.
  • Measured crossing. The gap between the parcels either side of this crossing could not be measured from the geometry, which is a reason for more caution, not less.

Following it on the ground No published way to follow

at least 1½ hours out and back

at least three quarters of an hour there at least three quarters of an hour back

5 m up and 10 m down on the way out — so the return leg climbs 10 m.

Walking only — nothing is counted for rest, water, photographs, navigation, or the state of the track.

Naismith's rule, and what it does not account for

No directions are published for this approach. The chain above is a statement about permission, not a path, and turning a run of parcels into "walk north-east for 380 m" would tell you where to walk on evidence nobody holds — including where a way is mapped along it, because what was measured is the chain and not the way. Steps appear here only for a route that follows a surveyed way end to end.

How much climbing Read off the published contour layer

Distance along the route, 0 to 1176.2 m · height 5.0 to 10.0 m Read off 5.0 m contours along the route's own line Official spatial — evidence class
Total climb
5.0 m
Total descent
10.0 m
Steepest sustained
6.9% over 72.0 m
Contour interval
5.0 m
Every height the contours record along this route
Contour crossings along the route, in order, as distance along the route against mapped height
Distance along Height
64.3 m 10.0 m
362.7 m 5.0 m
487.5 m 5.0 m
551.7 m 5.0 m
859.8 m 5.0 m
878.3 m 5.0 m
988.0 m 5.0 m
1060.0 m 10.0 m
1159.6 m 10.0 m
1176.2 m 5.0 m

The profile is the height the contour layer already records, read along the same line the legs above describe. It is not a survey of a path: nothing here says the ground between two contours is even, and a layer of 5.0 m contours cannot evidence a step smaller than the gap between them.

The line on the ground

Map

Route map: 10 legs from Merewether Street, 4018.5 m in total.

Every figure the map would draw — parcel references, distances, bearings and the crossing gap — is written out in full on this page, so nothing is only visible on the map. If the map does not load, nothing has been lost.

What this verdict rests on Grades compose to the weakest link

  • The destination sits on the parcel below Official spatial — evidence class

    Parcel 4769122, recorded tenure "Watercourse". Being at the destination and reaching it are separate questions, and this page answers only the second.

    Cadastre and protected-area estate layers Attribution licensed

  • Leg 1: 244121 carries a right of passage Official spatial — evidence class

    183.1 m at 15.7°. Read from the mapped parcel geometry in the official layer, with no inference beyond what the record states.

    Leg reference 244121 Grade official_spatial

  • Leg 2: 248035 carries a right of passage Official spatial — evidence class

    210.7 m at 95.4°. Read from the mapped parcel geometry in the official layer, with no inference beyond what the record states.

    Leg reference 248035 Grade official_spatial

  • Leg 3: 247883 carries a right of passage Statutory inference — evidence class

    36.9 m at 170.3°. The bed is State land by statutory inference from the Water Act 2000 (Qld) s.21 — law applied to a mapped parcel, not a finding by any authority.

    Leg reference 247883 Grade statutory_inference

  • Leg 4: 226071 carries a right of passage Statutory inference — evidence class

    1028.1 m at 185.0°. The bed is State land by statutory inference from the Water Act 2000 (Qld) s.21 — law applied to a mapped parcel, not a finding by any authority.

    Leg reference 226071 Grade statutory_inference

  • Leg 5: 226109 carries a right of passage Statutory inference — evidence class

    350.5 m at 136.0°. The bed is State land by statutory inference from the Water Act 2000 (Qld) s.21 — law applied to a mapped parcel, not a finding by any authority.

    Leg reference 226109 Grade statutory_inference

  • Leg 6: 226147 carries a right of passage Statutory inference — evidence class

    526.9 m at 77.0°. The bed is State land by statutory inference from the Water Act 2000 (Qld) s.21 — law applied to a mapped parcel, not a finding by any authority.

    Leg reference 226147 Grade statutory_inference

  • Leg 7: 4750844 carries a right of passage Statutory inference — evidence class

    328.2 m at 190.0°. The bed is State land by statutory inference from the Water Act 2000 (Qld) s.21 — law applied to a mapped parcel, not a finding by any authority.

    Leg reference 4750844 Grade statutory_inference

  • Leg 8: 4759014 carries a right of passage Statutory inference — evidence class

    223.6 m at 242.5°. The bed is State land by statutory inference from the Water Act 2000 (Qld) s.21 — law applied to a mapped parcel, not a finding by any authority.

    Leg reference 4759014 Grade statutory_inference

  • Leg 9: 4759090 carries a right of passage Statutory inference — evidence class

    535.3 m at 257.6°. The bed is State land by statutory inference from the Water Act 2000 (Qld) s.21 — law applied to a mapped parcel, not a finding by any authority.

    Leg reference 4759090 Grade statutory_inference

  • Leg 10: 4769122 carries a right of passage Statutory inference — evidence class

    595.2 m at 234.0°. The bed is State land by statutory inference from the Water Act 2000 (Qld) s.21 — law applied to a mapped parcel, not a finding by any authority.

    Leg reference 4769122 Grade statutory_inference

  • The chain is only as strong as its weakest link Statutory inference — evidence class

    Confidence is not an average. It is the weakest class in the chain above, which is why a single inferred leg holds the whole route at statutory inference.

    Composition rule: weakest grade wins Applied at build time

If something goes wrong

Emergency reference — read this to 000

Location
Mayfly Gully
Lot on plan
4769122
Coordinates
-27.55500, 152.98417 (WGS84 / GDA2020)
Feature
watercourse

What this approach was read from