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Frog Rock - Marvel Loch Road

WAUnclassified road31.1 km66 segments
2.4Sports
31.1 kmTotal length
66Segments
66Grey spot segments
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Frog Rock - Marvel Loch Road is a 31 km sealed road in Western Australia, Australia. It scores 5.6/10 for 4WDs with straight corners and rough surface.

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Vehicle scores
2.4/10
SPTSportsSealed roads, curviness, mountain passes
5.1/10
MOTMotoTight bends, switchbacks, technical roads
4.0/10
EVEVSmooth surface, sealed roads, range-friendly
5.6/10
4WD4WDGravel access, off-road suitability
2.6/10
VANCaravanSmooth sealed, gentle grades, no steep passes
Segment quality distribution
Sports score - 66 segments
Excellent (8+)9%Good (6-8)33%Poor (<4)58%

Sports score IQR: 2.4 - 6.4

Surface
Surface coverage
Sealed42%Unsealed58%
Score breakdown
Median component scores across all segments
Surface
3.0
Median surface quality. Smooth sealed asphalt scores 10. Chipseal 8. Gravel 5.
Curviness
0.0
Median curviness. Higher scores mean more bends per kilometre.
Speed
10.0
Speed limit suitability. Sweet spot is 60-110 km/h.
Road classUnclassified road
8.0
Road classification. Motorways score zero. Tertiary roads score 9.
Traffic
9.0
Estimated traffic density. Lower traffic = higher score.
Elevation
4.0
Elevation change per kilometre. More climbing = higher score.
Crash history
Aggregated across all 66 segments
66
Grey spots

Crash record linkage not yet available for WA. Grey spots are segments where curvature geometry mismatches the posted speed limit - these are flagged regardless of crash history.

Road environment
Geometry and climate-derived risk indicators
7.1/10 safety score - higher is safer
Wet road exposure49%
Night driving risk51%
Wind exposure49%
Sun glare risk99%
Wildlife strike risk11%

Risk values derived from road geometry, orientation, weather station data, and satellite canopy cover. 0 = minimal risk, 1 = maximum risk.

Segments
Top 66 segments by sports score
IDSurfaceLengthSportsMotoEV
#98806179Asphalt0.44 km8.88.88.8#98806193Asphalt0.38 km8.78.68.6#98806192Asphalt0.37 km8.38.28.1#98806194Asphalt0.45 km8.38.28.3#98806195Asphalt0.56 km8.28.18.1#98806203Asphalt0.48 km8.18.08.0#98806205Asphalt0.65 km7.37.07.2#98806191Asphalt0.50 km6.96.67.2#98806196Asphalt0.41 km6.76.46.8#98806184Asphalt0.50 km6.56.26.7#116191136Asphalt0.11 km6.46.16.6#98806185Asphalt0.31 km6.46.16.6#98806202Asphalt0.43 km6.46.16.6#98806182Asphalt0.50 km6.46.16.6#98806183Asphalt0.48 km6.46.16.6#98806186Asphalt0.50 km6.46.16.6#98806187Asphalt0.50 km6.46.16.6#98806198Asphalt0.50 km6.46.16.6#98806199Asphalt0.52 km6.46.16.6#98806201Asphalt0.50 km6.46.16.6#98806204Asphalt0.50 km6.46.16.6#98806181Asphalt0.50 km6.25.96.3#98806200Asphalt0.50 km6.25.96.3#98806190Asphalt0.50 km6.25.96.3#98806180Asphalt0.50 km6.25.96.3#98806189Asphalt0.50 km6.25.96.3#98806197Asphalt0.50 km6.25.96.3#98806188Asphalt0.51 km6.25.96.3#99595382Unpaved0.21 km2.44.54.0#99225224Unpaved0.50 km2.44.34.0#99225225Unpaved0.40 km2.44.54.0#99595383Unpaved0.50 km2.44.54.0#99225226Unpaved0.00 km2.44.34.0#99595386Unpaved0.50 km2.44.34.0#99595391Unpaved0.50 km2.44.54.0#99595392Unpaved0.49 km2.45.74.0#99225206Unpaved0.57 km2.44.54.0#99225207Unpaved0.39 km2.46.04.0#99225208Unpaved0.50 km2.44.74.0#99225209Unpaved0.50 km2.44.74.0#99225211Unpaved0.50 km2.44.54.0#99225212Unpaved0.50 km2.45.54.0#99225213Unpaved0.50 km2.44.54.0#99225214Unpaved0.50 km2.44.34.0#99225215Unpaved0.50 km2.44.54.0#99225216Unpaved0.50 km2.44.34.0#99225217Unpaved0.50 km2.44.54.0#99225218Unpaved0.50 km2.44.34.0#99225219Unpaved0.50 km2.44.54.0#99225220Unpaved0.50 km2.44.34.0#99225202Unpaved0.57 km2.44.54.0#99225203Unpaved0.50 km2.44.54.0#99225204Unpaved0.57 km2.44.54.0#99225205Unpaved0.50 km2.45.94.0#99225210Unpaved0.50 km2.44.54.0#99225221Unpaved0.50 km2.44.54.0#99225201Unpaved0.50 km2.44.74.0#99595381Unpaved0.26 km2.46.04.0#99595387Unpaved0.50 km2.44.34.0#99595385Unpaved0.50 km2.44.54.0#99595388Unpaved0.50 km2.44.34.0#99595389Unpaved0.50 km2.44.54.0#99595384Unpaved0.50 km2.44.34.0#99595390Unpaved0.50 km2.44.34.0#99225222Unpaved0.50 km2.44.34.0#99225223Unpaved0.50 km2.44.54.0
API reference
Road aggregate data via the Contour API
GET/api/v1/roads/frog-rock-marvel-loch-road-waRoad aggregate - scores, stats, risk profile, activity, segment list
GET/api/v1/roads/search?q=Frog%20Rock%20-%20Marvel%20Loch%20Road&state=WASearch roads by name

Councils & Government

This road is part of WA's road network. Contour scores every road in Australia for surface condition, curviness, grey spot classification, and 4WD track passability. If your organisation manages this road or promotes tourism in the region, this data is available via API.

Enquire about council data access →
Frequently asked questions
How long is Frog Rock - Marvel Loch Road?+

Frog Rock - Marvel Loch Road is approximately 31 km long. At typical touring speeds, expect around 1 hour of driving end to end, excluding stops.

Is Frog Rock - Marvel Loch Road sealed?+

Yes. Frog Rock - Marvel Loch Road is fully sealed for its entire length.

Is Frog Rock - Marvel Loch Road good for motorcycles?+

It is passable. Frog Rock - Marvel Loch Road scores 5.1/10 for motorcycles. Consider it a connector rather than a destination ride.

Can I drive Frog Rock - Marvel Loch Road in a caravan?+

Not recommended. Frog Rock - Marvel Loch Road scores 2.6/10 for caravans due to geometry, surface or gradient. Consider an alternative route if towing.

Are there any dangerous sections on Frog Rock - Marvel Loch Road?+

Contour has identified 66 grey spots on Frog Rock - Marvel Loch Road - sections where the road geometry does not match the posted speed limit. Take extra care in wet or low-visibility conditions.

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Road data last updated: 22 April 2026. Scores are based on road geometry, surface, and traffic data. Always drive to conditions and follow local road rules.

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