Mammoth Mountain to Devil's Postpile National Monument via Minaret Road

This route is considered moderate for racebike cycling, but it involves significant elevation changes and varied road conditions. The descent into Devil's Postpile is particularly challenging, with narrow, twisty, and steep sections, including a substantial 2,000-foot elevation loss. The road surface can range from 'OK to terrible'. The return climb, especially the final 2.5 miles, is described as 'truly tough' with about 1,970 feet of ascent. The entire ride is at high altitude, topping out at 9,170 feet, which can make breathing difficult for those not acclimated.

Cyclists are treated to 'epic scenery in the Eastern Sierra'. From Top of Minaret Road/Postpile Road (Minaret Vista), you'll have panoramic views of the jagged Minarets. As you continue, you'll enjoy 'nice views up and down the canyon' and pass through 'pretty woods'. The destination, Devil's Postpile National Monument, is a unique geological formation, and nearby Devil's Postpile National Monument Ranger Station — PCT/JMT is a key facility. Don't miss the Mammoth statue 🐘 Mammoth Mountain Resort at the start.

The best time to cycle this route is typically when Reds Meadow Road (Minaret Road) is open, usually from June to October. However, for a unique experience without vehicle congestion, consider cycling during the seasonal road closure from October to June. During this period, the road is closed to public vehicle traffic due to snow, making it a 'perfect avenue for two-wheeled adventure' for cyclists.

The route starts near Mammoth Mountain. To reach Devil's Postpile National Monument, you'll cycle down Minaret Road. Parking is available at the start of the route near Mammoth Mountain. Once you reach the monument area, cyclists cannot ride directly to Devil's Postpile itself; it requires a short 0.4-mile walk (0.8-mile round trip) from the parking area. During peak visitation hours (11 am to 4 pm), it's not recommended to ride into the valley due to congestion.

Yes, Devil's Postpile National Monument is part of the National Park System. There may be entrance fees or specific regulations for accessing the monument, especially if you are driving a vehicle. It's always best to check the official National Park Service website for the most current information on fees and permits before your visit. You can find details at nps.gov/depo.

While the general area around Mammoth Lakes is often dog-friendly, specific regulations apply within Devil's Postpile National Monument. Typically, dogs are allowed on leash in developed areas and on some trails, but restrictions may apply to certain sensitive areas or shuttle buses. Always check the official National Park Service website for the most up-to-date pet policies within the monument before bringing your dog.

Yes, you can! Shuttle buses operate from the valley back up to Mammoth Mountain. Cyclists can transport their bikes on these buses, though space is limited to two bikes per bus, and a transportation fee applies. This is a great option if you want to enjoy the scenic descent without the challenging return climb.

Minaret Road is narrow, winding, and steep, and it's shared with vehicular traffic, including large RVs, stock trailers, and shuttle buses. Extreme caution is necessary. There's a speed limit of 15 mph for both vehicles and cyclists. Downhill traffic must yield to uphill traffic. Be aware of potential debris on the road, especially on the steepest parts where the surface can be rough. Riding into the valley during peak visitation hours (11 am to 4 pm) is not recommended due to congestion.

The one-way descent from Mammoth Mountain to Devil's Postpile National Monument is approximately 27.3 km (17 miles) and takes about 2 hours. However, the full out-and-back journey, including the challenging climb back, will take significantly longer. The total duration for the round trip, including the climb, is estimated to be around 2 hours and 3 minutes of moving time, but plan for more time to account for stops, photos, and the strenuous ascent.

Given the high altitude, varied road conditions, and significant elevation changes, it's crucial to be well-prepared. Bring plenty of water, snacks, and layers of clothing as temperatures can change. A well-maintained racebike with good brakes is essential for the steep descents. A helmet, repair kit, and first-aid supplies are also highly recommended. Consider a bell or horn to alert vehicles and other cyclists on the narrow road.

Yes, the route also passes through sections of the Minaret Road, which is the primary path for this tour. Additionally, you'll find yourself near other trails such as the Sotcher Lake Feeder Trail, Starkweather Lake Trail, and the Mammoth Mountain Trail in the vicinity.