more stats
1.3 miles
Distance
754 ft
Climb
00:30:06
Avg time
756 ft
Altitude change
7,498 ft
Altitude min
8,255 ft
Altitude max
7,498 ft
Altitude start
8,255 ft
Altitude end
11.3%
Grade
-0.6%
Grade max
43.2%
Grade min
1 mile
Distance climb
23 ft
Distance down
20 ft
Distance flat
00:30:06
Avg time

Mount Islip Trail Details

  • Activities
    • Hike
    • Mountain Bike
    • Horse
    • Trail Running
  • Riding Area
    Crystal Lake
    Glendora, California
  • Ref Number
    9W05
  • Difficulty Rating
    Blue Rate
  • Local Popularity
    45 in Mountain Biking heatmap [+]
    • 5 in Trail Running
    • 80 in Hiking
    • 5 in Horseback
  • Global Ranking
    #166319 in Mountain Biking [+]
    • #166174 in Trail Running
    • #28889 in Hiking
    • #26627 in Horseback
  • State Ranking
    #6,145 in Mountain Biking · California [+]
    • #8,527 in Trail Running
    • #1,593 in Hiking
    • #1,823 in Horseback
  • Hiking SAC Scale
    T2 Mountain Hiking
  • Trail Type
    Singletrack
  • Bike Type
    AM, XC
  • Direction
    Both Directions
    Popular Direction Shown
  • Climb Difficulty
    Blue
  • Physical Rating
    Hard
  • Trail Visibility
    Always easy to follow
  • Dogs Allowed
    Yes

The Mount Islip Trail leads from Little Jimmy CG to the summit of Mount Islip. The grade is moderate with some short steep sections. About 1km above Little Jimmy CG, the trail intersects with the Windy Gap Connector, then continues up the ridge toward the summit. About 0.5km before the summit, the Islip Ridge Trail branches left at a signed junction.

Tags
Hut or cabinRidgelineSummit

Traditionally Indigenous Territory

Recent Activity on Trail

Past Week
  • 0 rides
  •  
6 Months
  • 1 rides
  • 13 miles avg distance
All
  • 15 rides
  • Last: Jun 1, 2026
c1c2c3c4
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update trails status or condition

Mount Islip Trail Trail Reports

statusdatedescription
May 19, 2024 @ 10:12pm
May 19, 2024
 Still 50% snow coverage on the slope above Little Jimmy CG, depth about 1m/3ft. Few patches again on the ridge, but mostly clear.
Oct 9, 2022 @ 2:46pm
Oct 9, 2022
 Buckthorn and manzanita has been trimmed recently, all clear. Some loose rock and minor ruts from recent rains.
Apr 30, 2022 @ 10:56pm
Apr 30, 2022
 Some buckthorn overgrowth, mostly on the south side of the ridge nearing the summit. Otherwise, good conditions.
more »
Status:
on May 19, 2024
Snow Cover Partial
Avg: 3.98 (1 votes)
Your vote: 0

view (17)
close
      Directions to mount-islip-trail trailhead (34.347380, -117.830560)
      View on Discover Map 3D Tour

      Photos

      5 more »
      mtb
      60 |
      Nov 1, 2023 @ 9:27pm
      Nov 1, 2023
      mtb
      78 |
      Oct 9, 2022 @ 2:50pm
      Oct 9, 2022
      mtb
      130 |
      Aug 10, 2020 @ 10:08pm
      Aug 10, 2020
      hike
      85 |
      Oct 15, 2022 @ 11:13pm
      Oct 15, 2022
      Views 4Summit 2Winter 1

      Videos

      2 more »
      Pan NE-E-SE from summt
      mtb
      0:20 | 25 | Oct 9, 2022 , Glendora
      Mellow Climb on Mt Islip
      mtb
      2:24 | 22 | Jul 7, 2022 , Glendora

      Technical Trail Features (TTF)

      4.0 ★★★★★
      1 Ratings
      5 ★
      4 ★ 100%
      3 ★
      2 ★
      1 ★

      Reviews / Comments

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      Use trail reports to comment on trail conditions.


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      Nearby Trails

      Crystal Lake

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      Frequently Asked Questions

      ▼ Where is Mount Islip Trail located?
      Mount Islip Trail is located in Crystal Lake, Glendora, California, United States. It is part of the Crystal Lake trail network. The trailhead is located at coordinates 34.34738, -117.83056.
      ▼ How hard is Mount Islip Trail?
      Mount Islip Trail is rated as Blue difficulty. The physical rating is Hard. The average grade is 11.3%. The climb difficulty is rated Blue.
      ▼ What is the elevation gain for Mount Islip Trail?
      Mount Islip Trail has 754 ft of elevation gain. The elevation ranges from 7,498 ft to 8,255 ft.
      ▼ Is Mount Islip Trail a point to point trail?
      Mount Islip Trail is not a point to point trail. The direction is Both Directions. The trail type is singletrack.
      ▼ How long is Mount Islip Trail?
      Mount Islip Trail is 1.3 miles long. The trail type is singletrack.
      ▼ Are dogs allowed on Mount Islip Trail?
      Yes, dogs are allowed on Mount Islip Trail. Please keep dogs on a leash where required and clean up after them.
      ▼ When is the best time of year to ride Mount Islip Trail?
      Based on activity log data, the most popular months to ride Mount Islip Trail are:
      • May (1 activities)
      • June (1 activities)
      Check the reports page for current trail conditions.
      ▼ How do I access Mount Islip Trail? Where is the closest parking trailhead?
      The closest parking and trailhead locations to Mount Islip Trail are: View all parking locations in the area.
      ▼ How long does it take to ride Mount Islip Trail?
      Based on recorded activities, it takes an average of 30 minutes to ride Mount Islip Trail. The trail is 1.3 miles long. Actual times will vary based on fitness level, conditions, and pace. View recent activity logs for more details.
      ▼ How busy is Mount Islip Trail?
      Mount Islip Trail is a moderately popular trail. There have been 15 recorded activities on this trail. The trail has received 17 check-ins. View recent activity on this trail.

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