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Summit of Colby Trail

5 ★★★★★ 16 Google reviews · Running trail in Glendora, California · Open 24 hours

Runner's snapshot

Surface
Not reported
Distance
Not reported
Shape
Not reported
Shade
Not reported
Access
Open 24 hours

Confirmed from Summit of Colby Trail'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.

Summit of Colby Trail — running trail in Glendora, CA, photo 1
Summit of Colby Trail — running trail in Glendora, CA, photo 2
Summit of Colby Trail — running trail in Glendora, CA, photo 3
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Open 24hHilly

What runners say about Summit of Colby Trail

Pulled from public reviews of this trail (16 of them) — the things people bring up again and again, in their own words. Nothing here is written by us.

👟 good for all levels 2 mentions

“Will say beginner friendly, though expect to get your heart pumping and some heavy breathing.”

It's a great hike with a smooth consistent up hill traverse. Will say beginner friendly, though expect to get your heart pumping and some heavy breathing. Gets progressively more difficult, not overwhelming, after second gmr crossing. Overall good hike. Would suggest to wear a hat during the morning and afternoon hrs.

★★★★★ — Shawn , Jul 2020

Summit of Colby Trail offers an impeccable view of the San Gabriel Mountains. This trail is popular among Xtreme bikers. Getting into the summit was challenging due to steady steep incline and no tree shades along the way up. Overall, worth it.

★★★★★ — Carlo , Aug 2024

Excerpts from public Google reviews. Read all 16 reviews →

Trail conditions & character

What this trail is actually like underfoot and overhead, taken from its own listing and from reviews. Each one links to every other trail with the same character. Busy or quiet is reported as a plain fact, not a plus or a minus — a runner heading out alone at dawn often wants company on the path, and someone running intervals wants an empty one.

⛰️ Hills / elevation 3 mentions

“Getting into the summit was challenging due to steady steep incline and no tree shades along the way up.”

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Plan your run at Summit of Colby Trail

The practical stuff

  • AccessOpen 24 hours — no gate to beat, so a 5am or a 10pm run both work
  • DistanceNot reported. Trail systems often quote total path mileage rather than a single loop, so measure the route you actually want before you drive out.
  • ShadeNot reported. Assume some of it is exposed and carry water in summer.

Hours

Monday Open 24 hours
Tuesday Open 24 hours
Wednesday Open 24 hours
Thursday Open 24 hours
Friday Open 24 hours
Saturday Open 24 hours
Sunday Open 24 hours

Posted hours for the park or trailhead. Gates and parking lots often close earlier than the trail itself, and seasonal hours change — worth a check before a pre-dawn or after-dark run.

Where to find Summit of Colby Trail

Upper Colby Trail, Glendora, CA 91741

Get directions

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.

Glendora Cross Trailhead

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under a mile away

Lower Monroe Truck Trail

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4 miNatural surfaceShadedScenic

Outdoor recreation area with hiking trails, mountain biking, and plenty of water.

under a mile away

Upper Colby

4.8 ★★★★★ 71 reviews

Glendora, CA

2 miScenic

Hiking and biking area featuring sunflowers and other plants, plus a riverside.

under a mile away

Mystic Canyon Trail

4.8 ★★★★★ 6 reviews

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1.1 miles away

Start of Punk Out Trail

4.8 ★★★★★ 13 reviews

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1.2 miles away

Top of Punk Out Trail

4.8 ★★★★★ 59 reviews

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ScenicDog-friendly

Hiking area with a trail leading to a hilltop viewpoint.

1.2 miles away

All running trails in Glendora, CA →

Nearby towns

Listing verified July 2026 from public records, the trail's own website and runner reviews. Trail conditions change — paths flood, gates close at dusk, and shaded woods stay muddy for days after rain. Something out of date? Report a correction. Manage this trail? Send us the details — it is free.