Best backpacking trips near Fullerton, CA

Ranked by straight-line distance from Fullerton (population ~143,617) to each trip's trailhead. Drive times are rough estimates — mountain roads are slower than they look.

Fullerton backpacking at a glance

La Jolla Trail is the closest documented backpacking trip to Fullerton — the La Jolla Trail Trailhead trailhead sits roughly 28 miles away, about 31 minutes by car. Of the 12 closest routes, 12 are within a two-hour drive of town, spanning Los Padres backcountry, Channel Islands, San Gorgonio Wilderness, San Jacinto Mountains, Anza-Borrego Desert State Park and Sespe WildernessTrailheads for these trips sit between 26 and 11,499 feet, so you can pick a low, warm-season start or a high alpine route depending on the month.

4 of these 12 routes need no wilderness permit — useful for spontaneous weekends. Across the twelve closest trips, the months hikers rate best are October, June, September.If you want the gentlest introduction, Borrego Palm Canyon climbs only 700 feet over 3 miles; the biggest single-trip climb nearby is Vivian Creek Trail to San Gorgonio at 10,800 feet of total gain over 15.6 miles.

#	Trip	Miles away	Est. drive	Distance	Gain	Difficulty	Permit
1	La Jolla Trail Los Padres backcountry	28 mi	~31 min	9 mi	—	10	None
2	Trans-Catalina Trail Channel Islands	44 mi	~49 min	38.5 mi	7,638 ft	49	Required
3	San Bernardino Peak Trail San Gorgonio Wilderness	57 mi	~64 min	17.8 mi	9,300 ft	55	Required
4	Forsee Creek to Johns Meadow San Gorgonio Wilderness	60 mi	~66 min	7.8 mi	1,600 ft	12	Required
5	Momyer Creek to Dollar Lake Saddle San Gorgonio Wilderness	60 mi	~66 min	18.4 mi	4,560 ft	44	Required
6	Vivian Creek Trail to San Gorgonio San Gorgonio Wilderness	61 mi	~67 min	15.6 mi	10,800 ft	61	Required
7	South Fork Trail to Dry Lake San Gorgonio Wilderness	64 mi	~71 min	11.4 mi	4,400 ft	31	Required
8	Devil's Slide to Wellman Divide San Jacinto Mountains	72 mi	~80 min	10.6 mi	3,300 ft	38	Required
9	Devil's Slide to San Jacinto Peak San Jacinto Mountains	72 mi	~80 min	16 mi	4,500 ft	65	Required
10	Buck Creek Trail Los Padres backcountry	76 mi	~85 min	22.4 mi	—	45	None
11	Borrego Palm Canyon Anza-Borrego Desert State Park	96 mi	~107 min	3 mi	700 ft	4	None
12	Gene Marshall–Piedra Blanca Trail Sespe Wilderness	96 mi	~107 min	18.6 mi	4,000 ft	36	None

Three ways to start backpacking from Fullerton

Closest trailhead: La Jolla Trail — about 28 miles / 31 minutes from town.
Gentlest outing: Borrego Palm Canyon — difficulty 4/100 (Easy), 1–2 days.
Biggest adventure: Vivian Creek Trail to San Gorgonio — 15.6 miles and 10,800 ft of climbing.

Distances are great-circle miles from Fullerton to trailhead coordinates; actual road distances will be longer. Town data: Wikidata SPARQL (CC0), population values derived from U.S. Census Bureau estimates.

Backpacking near Fullerton: common questions

What is the closest backpacking trip to Fullerton?

La Jolla Trail is the closest documented trip to Fullerton at roughly 28 miles (about 31 minutes of driving) from the La Jolla Trail Trailhead trailhead.

Do I need a permit to backpack near Fullerton?

The closest documented trip, La Jolla Trail, does not require a wilderness permit — but many other California routes do, so always check.

When is the best season to backpack near Fullerton?

For La Jolla Trail — the closest trip to Fullerton — the best months are March, April, May, October, November.