16.9 miles
Distance
3,716 ft
Climb
-3,652 ft
Descent
1,876 ft
High Point

A fun loop for any rider with good fitness.

Detailed Description
Ponti Ridge + Big Rock 18 Mile Loop is a 17 mile popular intermediate route located near Lucas Valley - Marinwood California. This mountain bike only route. This route includes 6 trails. This route climbs 3,716 ft with a max elevation of 1,876 ft then descends -3,652 ft.
Local Trail Association
Local trail association
Marin County Bicycle Coalition (www.marinbike.org)
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Details

More Stats for Ponti Ridge + Big Rock 18 Mile Loop mountain bike route
  • Altitude change
    63 ft
  • Altitude min
    121 ft
  • Altitude start
    121 ft
  • Altitude end
    184 ft
  • Grade
    0.1%
  • Grade max
    -70.6%
  • Grade min
    85.4%
  • Distance climb
    6 miles
  • Distance down
    10 miles
  • Distance flat
    2,972 ft
Avg: 3 (1 votes)
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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
Trail Flow (Ridden Direction)
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Trail Popularity ?
Trailforks scans ridelogs to determine which trails are ridden the most in the last 9 months. Trails are compared with nearby trails in the same city region with a possible 25 colour shades. Think of this as a heatmap, more rides = more kinetic energy = warmer colors.
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Radar Time
x Activity Recordings
Trailforks users anonymized public ridelogs from the past 6 months.
  • mountain biking recent
  • mountain biking (>6 month)
  • hiking (1 year)
  • moto (1 year)
Activity Recordings
Trailforks users anonymized public skilogs from the past 12 months.
  • Downhill Ski
  • Backcountry Ski
  • Nordic Ski
  • Snowmobile
Winter Trails
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82 | 1 comments
Ponti Ridge | Novato California
Ponti Ridge | Novato California
12:08 | 369 | comments: 0 | favs:
Jun 22, 2022

Recent Trail Reports Along Route

statustraildateconditiondescription
Chicken Shack Fire Road
Jun 14, 2025 @ 3:01pm
Jun 14, 2025
Ponti Ridge Trail
May 1, 2025 @ 9:31am
May 1, 2025
Luiz Fire Road
Jul 21, 2024 @ 4:22pm
Jul 21, 2024
Big Rock Trail
Jul 16, 2024 @ 12:49am
Jul 16, 2024
reporter
Redwood Canyon Fire ROad
May 5, 2024 @ 7:33am
May 5, 2024
Closed west of Big Rock Trail, open to the east
more reports »
  • By Larryeskabob & contributors
  • #59034 - 349 views