Casner Canyon Trail: Oak Creek Canyon's Locals-Only Descent

5.4-mile round trip, hard, 1,400 ft. AZ-89A pullout near mile marker 376, no pass. Unmaintained steep switchbacks into Oak Creek Canyon bottom with cold creek crossing. Not on most maps. Best October through April.

By The Lowdown Guide Editorial Team · Visited Spring 2026 · Updated May 2026

Trail Stats

  • Distance~5.4 mi RT
  • DifficultyHard
  • Elevation Change1,400 ft descent (and back up)
  • Trail TypeOut and back (descent + ascent)
  • ParkingFree informal pullout ~6 vehicles, AZ-89A near MM 376
  • Pass RequiredNo (free roadside access)
  • Creek CrossingRequired; knee-deep Mar-May, ankle-deep fall
  • Best SeasonOct-Apr (avoid summer heat entirely)
The Lowdown Verdict: Casner Canyon Trail is Sedona's most demanding locals-only route: a 1,400-foot plunge into Oak Creek Canyon bottom on an unmaintained, unsigned, off-most-maps path. It is not a trail you discover by accident. The reward is a quiet Oak Creek pool away from Slide Rock's crowds -- but earning it requires a brutal climb back out on exposed south-facing terrain. This trail is for fit, experienced hikers only, and only in the October through April shoulder season. In summer the south-facing upper slopes become a heat trap that is genuinely dangerous. For the Oak Creek Canyon corridor context -- including Slide Rock, swimming holes, and the upper canyon access -- see the West Fork Oak Creek Trail guide and the broader Sedona hiking index.
What Casner Canyon Trail Is Not:
  • Not a maintained trail. Casner Canyon Trail has no official trail designation, no maintained tread, no trail markers, and no trailhead sign. The path is a use trail created by repeat visitors. Navigation requires paying attention to the terrain and descent direction. Do not attempt without prior research on the entry point.
  • Not appropriate in summer. The upper descent is south-facing and fully exposed. Summer afternoon temperatures on the slope can reach 110 degrees Fahrenheit or higher. The climb back out in summer heat is a genuine medical risk. This is not a dramatic statement -- people have required rescue on similar exposed Oak Creek Canyon slopes in summer. Stick to October through April.
  • Not a beginner or casual hike. 1,400 feet of elevation change over 5.4 miles with no maintained switchbacks on the steepest sections is genuinely demanding. The descent is deceptively easy going down -- the brutal reality is the climb back up with tired legs in the afternoon. Honest self-assessment of fitness is required before choosing this trail.
  • Not part of Slide Rock State Park. The Casner Canyon pullout is on AZ-89A in Coconino National Forest, not inside Slide Rock State Park. No Slide Rock entrance fee applies. However, Slide Rock is the nearest developed facility -- approximately 1 to 2 miles north -- for restrooms, water, and emergency assistance.

Trailhead: AZ-89A Mile Marker 376

The Casner Canyon trailhead is an informal pullout on the west side of AZ-89A near mile marker 376 in Oak Creek Canyon. From Sedona, take AZ-89A north approximately 8 miles through the canyon. The pullout is located between Indian Gardens and Slide Rock State Park -- if you reach the Slide Rock entrance station heading north, you have gone approximately 1 to 2 miles past the pullout. Coming south from Flagstaff, the pullout is approximately 15 miles south of Flagstaff on AZ-89A, before reaching Slide Rock.

The pullout holds approximately 6 vehicles in an informal gravel-and-dirt area directly beside the highway. There is no sign, no kiosk, and no fee. The faint use trail begins from the west side of the pullout and immediately starts descending toward the canyon. There is no formal trailhead infrastructure of any kind. First-time visitors should study the entry point on satellite imagery before arriving -- the descent route is clear once you are standing at the top looking down, but the pullout itself is easy to miss at highway speed on a winding mountain road.

AZ-89A through Oak Creek Canyon is a two-lane mountain highway with curves, limited sight lines, and heavy tourist traffic in spring and summer. Pull completely into the pullout when parking. Do not park on the highway shoulder outside the pullout area -- the blind curves create serious hazard.

Trail Breakdown: The Descent and Return

0-0.8 mi

Pullout to Upper Canyon Rim

The first 0.8 miles descend the upper south-facing slope on loose switchbacks through manzanita and scrub oak. This section is fully exposed to sun. The grade is steep from the start -- approximately 600 feet of descent over the first 0.8 miles. In summer this zone becomes a heat trap by 9 AM.

0.8-1.8 mi

Canyon Transition Zone

As the trail drops below the canyon rim and into the canyon proper, vegetation transitions from exposed scrub to denser riparian species. Arizona sycamore, cottonwood, and canyon grape begin appearing. The descent grade moderates slightly but remains steep. Views up the canyon walls are dramatic in this section.

1.8-2.7 mi

Canyon Bottom and Oak Creek Crossing

The trail reaches Oak Creek Canyon bottom at approximately mile 1.8. The final 0.9 miles follow the canyon floor to the creek crossing. Oak Creek at this point runs through a quiet pool-and-riffle sequence away from Slide Rock's tourist infrastructure. The creek crossing at the bottom is the endpoint of the maintained route -- approximately knee-deep March through May, ankle-deep by fall.

2.7-5.4 mi

The Return Climb

Return the same way. The climb back up is the defining challenge of the route. Budget at least 50% more time for the ascent than the descent. The exposed upper section (miles 4.6 to 5.4 from the bottom) is where most hikers underestimate the physical demand. Take breaks in the shade of the lower canyon before committing to the exposed final push.

Season, Timing, and Safety

October through April is the safe and recommended window for Casner Canyon Trail. The specific caution for summer is not merely discomfort -- the south-facing upper slope faces full afternoon sun in a canyon that channels and intensifies heat. May through September brings ambient temperatures in Oak Creek Canyon that regularly exceed 95 degrees Fahrenheit at road level; on the exposed south-facing slope 1,400 feet above, add another 5 to 10 degrees of radiant heat from the rock surface. The climb out in these conditions is where people get into serious trouble.

Spring (March and April) is the most visually rewarding window: Oak Creek is running with snowmelt, the canyon bottom is green and lush, and temperatures at trail level are comfortable for the exposed sections if you start before 7:30 AM. The creek crossing in March and early April can be knee-deep and cold -- bring trekking poles and waterproof boots or accept wet feet. By late April the creek drops significantly.

Fall (October through November) is the second-best window: comfortable temperatures, lower creek levels, and autumn foliage from the riparian cottonwood and sycamore corridor. December through February is viable for fit hikers in dry conditions but the upper slope can become icy after winter precipitation -- traction devices (microspikes) are useful in those conditions. Check the Coconino National Forest trail conditions report before any winter visit.

Gear for Casner Canyon Trail

  • ✓Water: 3 liters minimum -- 5.4 miles with a brutal exposed climb; no water source en route; carry more than you think you need
  • ✓Hiking boots with ankle support -- loose rocky terrain on the unmaintained descent; trail runners are workable for experienced hikers but boots recommended for first visit
  • ✓Trekking poles -- strongly recommended for both the descent on loose rock and the creek crossing in spring snowmelt season
  • ✓Offline satellite map -- no cell service in the canyon; download CalTopo or AllTrails with satellite layer showing the descent route before leaving your car
  • ✓Extra food for 4-6 hours -- the climb back out takes longer than most hikers budget; plan for a full half-day outing at minimum
  • ✓Microspikes (December-February) -- the exposed upper slope can ice over after winter precipitation; traction devices prevent falls on frozen rock

Related Trails and Oak Creek Canyon Context

Casner Canyon sits in the Oak Creek Canyon corridor alongside two of Sedona's most visited destinations: West Fork Oak Creek Trail (the shaded riparian canyon hike, 6.9 mi RT, heavily crowded, Red Rock Pass required) and Slide Rock State Park (swimming holes, $20-30 fee, crowds peak June-August). Casner Canyon is the locals-only counterpart to both -- harder, free, uncrowded, and off the tourist map. For fit hikers who want to avoid Slide Rock's fee and crowds while getting an authentic Oak Creek Canyon bottom experience, Casner Canyon is the pick. For the broader hiking permit landscape in Sedona, the permits and passes guide covers all fee zones in the canyon corridor.

Guided Oak Creek Canyon Tours from Sedona

If you want a guided Oak Creek Canyon experience with local expertise on the canyon's history, geology, and access points -- without the navigation and route-finding demands of Casner Canyon -- Viator lists Oak Creek Canyon jeep and hiking tours from Uptown Sedona.

Find Oak Creek Canyon Tours on Viator →

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Stay Near Oak Creek Canyon

The Casner Canyon pullout is 8 miles north of downtown Sedona on AZ-89A. Staying in uptown Sedona or in one of the Oak Creek Canyon lodges puts you closest to the trailhead. Expedia lists Sedona area lodging with real-time availability.

Find Sedona Hotels on Expedia →

Frequently Asked Questions

Where is the Casner Canyon Trail trailhead on AZ-89A? +
The Casner Canyon Trail trailhead is an informal pullout on AZ-89A near mile marker 376 in Oak Creek Canyon, between Indian Gardens and Slide Rock State Park. The pullout holds approximately 6 vehicles and has no fee and no Red Rock Pass requirement. There is no trailhead sign on AZ-89A. Look for the pullout on the west side of the highway near mile marker 376 and a faint use trail descending into the canyon. If you reach Slide Rock State Park, you have passed the pullout heading north.
How hard is Casner Canyon Trail? +
Casner Canyon Trail is rated hard. The trail descends and then ascends 1,400 feet over approximately 5.4 miles round trip on an unmaintained steep path with loose rock sections and no switchback assistance in the steepest areas. The climb back out from the Oak Creek Canyon bottom is the defining challenge -- it is relentless and exposed on the upper half. Strong hikers with good fitness complete the round trip in 3.5 to 4.5 hours. Casual or beginner hikers should choose a different trail.
Is there a creek crossing on Casner Canyon Trail? +
Yes, Casner Canyon Trail requires an Oak Creek crossing at the canyon bottom. The crossing has no bridge. From March through May during snowmelt, the crossing can reach knee depth with cold fast water. By summer the crossing typically drops to ankle to calf depth. By fall it is usually ankle-deep or less. The creek at the canyon bottom is the reward of the descent -- a quiet Oak Creek pool away from Slide Rock's crowds -- but the crossing must be assessed carefully in spring before committing.
When is the best time to hike Casner Canyon Trail? +
The best time to hike Casner Canyon Trail is October through April. The brutal climb back out in summer heat is a genuine safety risk -- the upper half of the trail is fully exposed on south-facing terrain with no shade, and temperatures in the canyon can exceed 100 degrees Fahrenheit from June through August. Spring (March through April) is excellent for scenery and creek flow but brings cold snowmelt creek crossings. Fall (October through November) combines comfortable temperatures, lower creek levels, and autumn foliage in the riparian zone.
Do you need a permit or Red Rock Pass for Casner Canyon Trail? +
No permit and no Red Rock Pass are required for Casner Canyon Trail. The AZ-89A pullout near mile marker 376 is a free informal roadside parking area with no fee collection. This is one of the few hard canyon hikes in the Oak Creek Canyon corridor that is entirely free. The nearby Slide Rock State Park charges $20 to $30 per vehicle for day use -- Casner Canyon is not part of Slide Rock and does not share its fee structure.