more stats
4,390 ft
Distance
-235 ft
Descent
00:03:35
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
00:03:35
Avg time

Grom flow Details

  • Activities
    • Mountain Bike
  • Riding Area
    O'Halloran Hill
    Adelaide
  • Difficulty Rating
  • Local Popularity
    95 in Mountain Biking
  • Global Ranking
    #27117 in Mountain Biking
  • National Ranking
    #1,377 in Mountain Biking · Australia
  • 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.

Tags

Trail Supporters

Bike Park

Traditionally Indigenous Territory

Recent Activity on Trail

Past Week
  • 1 rides
  • 12 miles average
6 Months
  • 55 rides
  • 10 miles avg distance
All
  • 1,060 rides
  • Last: Oct 29, 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

view (9,785)
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      Directions to grom-flow trailhead (-35.048230, 138.542560)

      Photos

      1 more »
      report
      mtb
      210 |
      Dec 30, 2019 @ 6:52pm
      Dec 30, 2019

      Videos

      5 more »
      O'Halloran Hill - Grom Flow
      mtb
      3:31 | 319 | Apr 15, 2023 , Adelaide
      O'Halloran Hill - Gromflow - Green
      mtb
      4:15 | 184 | Dec 5, 2022 , Adelaide
      Gromflow on the wrong bike
      mtb
      4:29 | 577 | Mar 16, 2021 , Adelaide
      O'Halloran Hill - GromFlow
      ebike
      3:08 | 339 | Aug 19, 2023 , Adelaide

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      1 Review & Comments

      CloCkWeRX
      Fast and flowy, a lot of fun and practically impossible to muck up. Possibly my favourite trail of the day as a new to intermediate rider; as I could worry less about the technical and enjoy enjoy the ride

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      Frequently Asked Questions

      ▼ 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.
      ▼ How long is Grom flow?
      Grom flow is 4,390 ft long. The trail type is singletrack.
      ▼ Are dogs allowed on Grom flow?
      There is no information about dogs being allowed on Grom flow. Check with local trail managers or the trail page for the latest access rules.
      ▼ How do I access Grom flow? Where is the closest parking trailhead?
      The closest parking and trailhead locations to Grom flow are: View all parking locations in the area.
      ▼ How long does it take to ride Grom flow?
      Based on recorded activities, it takes an average of 4 minutes to ride Grom flow. The trail is 4,390 ft long. Actual times will vary based on fitness level, conditions, and pace. View recent activity logs for more details.
      ▼ How busy is Grom flow?
      Grom flow is a very popular trail. There have been 8,123 recorded activities on this trail. The trail has received 9,784 check-ins. View recent activity on this trail.

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