more stats
4,390 ft
Distance
-235 ft
Descent
00:03:31
Avg time
-235 ft
Altitude change
370 ft
Altitude min
605 ft
Altitude max
605 ft
Altitude start
371 ft
Altitude end
-5.3%
Grade
-25.6%
Grade max
2.5%
Grade min
62 ft
Distance climb
3,891 ft
Distance down
440 ft
Distance flat
00:03:31
Avg time

Grom flow Details

  • Activities
    • Mountain Bike
  • Riding Area
    O'Halloran Hill
    Adelaide
  • Difficulty Rating
  • Local Popularity
    100 in Mountain Biking
  • Global Ranking
    #11534 in Mountain Biking
  • Trail Type
    Singletrack
  • Bike Type
    AM, XC
  • Direction
    Downhill Only
    Popular Direction Shown
  • Climb Difficulty
    Green
  • Physical Rating
    Easy
  • Trail Visibility
    Always easy to follow
  • Family Friendly
    Yes
  • eBike Allowed
    Yes up to Class 1
  • TTFs on Trail
    Berm, Jump
  • Year Opened
    2019
  • Land Owner

This 1300m descending flow trail was built for the youngsters. Big berms and rollers will make for a grin that stays on long after the dirt has been washed off.

Trail Supporters

Bike Park

Traditionally Indigenous Territory

Recent Activity on Trail

Past Week
  • 1 rides
  • 11.3 km average
6 Months
  • 52 rides
  • 21.0 km avg distance
All
  • 1,014 rides
  • Last: Jul 4, 2026
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Grom flow Trail Reports

statusdatedescription
Mar 5, 2026 @ 10:14pm (Australia/Adelaide)
Mar 5, 2026
starting to get some chop and ruts around the Rocks and on berms. still rideable but needs some dirt back on the trail.
Sep 29, 2025 @ 3:39pm (Australia/Adelaide)
Sep 28, 2025
Minor erosion (trail braiding, small ruts developing, brake bumps)
Aug 29, 2025 @ 11:15pm
Aug 29, 2025
whole trail is good except for a tree down in the middle of the path about 100m down the trail.
Apr 22, 2025 @ 9:54am
Apr 22, 2025
Mar 30, 2025 @ 11:38am
Mar 30, 2025
exposed rock base rough bumpy and fun
more »
Status:
on Mar 5, 2026
Dry
Avg: 4.36 (16 votes)
Your vote: 0

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Trail Conditions
  • Unknown
  • Snow Groomed
  • Snow Packed
  • Snow Covered
  • Snow Cover Partial
  • Freeze/thaw Cycle
  • Icy
  • Prevalent Mud
  • Wet
  • Variable
  • Ideal
  • Dry
  • Very Dry
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  • Downhill Primary
  • Both Directions
  • Uphill Primary
  • Uphill Only
  • One Direction
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Slope Aspect
Direction the slope faces
Flat N NE E SE S SW W NW
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        Directions to grom-flow trailhead (-35.048230, 138.542560)

        Photos

        1 more »
        193 |
        Dec 30, 2019 @ 6:52pm
        Dec 30, 2019

        Videos

        5 more »
        O'Halloran Hill - GromFlow
        3:08 | 310 | Aug 19, 2023 , Adelaide
        O'Halloran Hill - Grom Flow
        3:31 | 286 | Apr 15, 2023 , Adelaide
        O'Halloran Hill - Gromflow - Green
        4:15 | 165 | Dec 5, 2022 , Adelaide
        Old Man Grom Flow
        5:08 | 393 | Apr 27, 2021 , Adelaide

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        1 Review & Comments


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        Frequently Asked Questions About Grom flow

        Where is Grom flow located?
        Grom flow is located in O'Halloran Hill, Adelaide, Australia. It is part of the O'Halloran Hill trail network. The trailhead is located at coordinates -35.04823, 138.54256.
        How hard is Grom flow?
        Grom flow is rated as Green difficulty. The physical rating is Easy. The average grade is 5.3%. The climb difficulty is rated Green.
        What is the elevation gain for Grom flow?
        The trail has 235 ft of elevation descent. The elevation ranges from 370 ft to 605 ft.
        Is Grom flow a point to point trail?
        Yes, Grom flow is a point to point trail. The direction is Downhill Only. The trail type is singletrack.

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