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
40 in Mountain Biking [+]
- 5 in Trail Running
- 65 in Hiking
- 5 in Horseback
Global Ranking
#98623 in Mountain Biking [+]
- #276919 in Trail Running
- #100057 in Hiking
- #5923 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.

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

c1	c2	c3	c4
January	February	March	April
May	June	July	August
September	October	November	December

update trails status or condition

Mount Islip Trail Trail Reports

status	date	description
	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.