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Upper Colby
4.8 ★★★★★ 71 Google reviews · Running trail in Glendora, California · Hours vary
Runner's snapshot
- Surface
- Not reported
- Distance
- 2 mi
- Shape
- Not reported
- Shade
- Not reported
- Access
- Not reported
Confirmed from Upper Colby's own listing, the park or land manager's website, and runner reviews. Blank cells mean we could not verify that fact — we would rather say "not reported" than invent one. There is no Easy / Moderate / Hard rating on this page on purpose: a one-word difficulty score tells you nothing about whether a trail suits your run. Surface, distance, shade and hours do.
Hiking and biking area featuring sunflowers and other plants, plus a riverside.
What runners say about Upper Colby
“Beautiful early morning hike, cold so almost no one out-”
“The grade is at a steady 20 - 25° so it is an easy hike for beginners.”
Absolutely breathtaking views. This was my first hike up colby trail and my run ins with others and the nature was just amazing. I had thee most enjoyable 3 hour roughly 2 mile exploration all around this hidden gem.
The Colby Trail is 3.11 miles or about 5kms up stiff and steep hillsides. The trail is carved out for you to follow but how you climb the upper portion is up to you and your ability to maintain your balance. This trail is great for a WoD finisher as a cardio aspect. Also great just for the views at the top.
At just shy of a mile hike, this local trail makes for a quick stroll into nature. The grade is at a steady 20 - 25° so it is an easy hike for beginners. Street parking is available but very limited. The trail starts at the top of Lorraine Ave and ends at Glendora Mountain Road.
Glendora Mountains is a wonderful area. Not too widely advertised, not too touristy, lacks some facilities. Yet it's well worth a visit as trails are great, view is fantastic. Just one quick note: although trails are not too long they tend to be steep, strenuous.
Trail conditions & character
“Cool quick little hike with some nice views steep hills and shaded areas along trail”
“I had very flexible shoes to cover the steep treks once you start intersecting the road.”
Plan your run at Upper Colby
The practical stuff
- AccessHours vary — hours are not posted for this trail, so check before an early or late run
- Distance2 mi as reported — check whether that is one way or a round trip before you commit
- ShadeNot reported. Assume some of it is exposed and carry water in summer.
Running trails near Glendora
Other trails within easy driving distance — useful when this one is flooded, gated, or just not the run you had in mind today.
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