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Alger Lakes 3-4 Day Guided Backpacking Trip

Guided ·

5.0

Mammoth Lakes

Locally Owned

Private

Instant Book

Duration: 3 days

Pricing

Adult 3 Day

$875

Adult 4 Day Koip Summit

$1,175

One Person Private Rate 3 Day

$1,050

Description

Backpacking to Alger Lakes with a Koip Peak Summit Option!

This is a trip for hikers who love a little burn in the legs and big payoffs in the high country. Starting in the mountain town of June Lake, the Alger Lakes backpacking trip wastes no time—day one kicks off with a steep, honest climb toward Gem Lake, where the views open fast and keep getting better. As you grind upward toward Gem Pass, the valley drops away behind you and Koip Peak begins to dominate the skyline, setting the tone for what’s ahead.

Beyond the pass, the trail leads into the wild heart of the range: Alger Lakes, a pair of deep blue alpine lakes tucked beneath shale slopes and towering rock walls. This is high-elevation camping at its best—quiet, dramatic, and earned. From camp, the adventure is yours to shape. Hike back down with full packs, or strip down to light daypacks and push higher for the optional Koip Peak summit. At 12,962 ft (3,950 m), just shy of 13,000, Koip is the fourth-highest peak in Yosemite, and the 360-degree views from the top are pure Sierra magic.

With short mileage, steep elevation gain, and optional summit objectives, this trip is an ideal training ground for bigger mountain goals—or simply a chance to test yourself in stunning terrain. Choose the 3-day itinerary for a challenging alpine escape, or go 4 days and tag the Koip summit for the full experience. Whether you’re chasing solitude, elevation, or that deep backcountry stoke, Alger Lakes delivers.

Difficulty Rating & Description

This trek follows well-maintained trails and covers a moderate to challenging daily distance of approximately 4–6 miles (6.5–9.5 km) per day. The overall difficulty depends on whether you choose the summit option.

Without the summit option: This trek is considered a Level 3 (Moderate) hike.
With the summit option: The trek becomes a Level 4 (Challenging) hike due to increased elevation gain and sections of cross-country travel.

Terrain & Trail Conditions

Mostly on established trails.
Day 3 (summit option) includes: A mix of on-trail and off-trail hiking, rocky sections with larger step-ups and step-downs, and short sections of cross-country travel.

Pack Weight & Hiking Style

Backpack weight will be approximately 30–40 lbs (13.5–18 kg) per person.
The summit hike is done with lighter daypacks, creating a more manageable basecamp-style ascent.

Trip Length & Elevation

Duration: 3–4 days
Total Distance: 17–24 miles (27 to 39 km)

Elevation Gain/Loss

Without summit option: +4,500 ft / –4,500 ft (1,372 m)
With Koip Peak summit: +6,900 ft / –6,900 ft (2,103 m)

Duration of Adventure

3 to 4 Day Options
The 4 day option includes the Koip Summit.
The start time will be around 8:00 am on the first day.

Location / Where to Meet

Check in/ Departure Address: June Lake Town

Ages & Requirements

This trek is designed for experienced backpackers. Please review the Difficulty Rating & Description section above for a full breakdown of terrain, mileage, and elevation.
Participants should have prior backpacking experience.
Participants should be capable of carrying an overnight pack for up to 5 miles (8 km) per day with 2,000–2,500 ft (610–762 m) of elevation gain, and be prepared to do so for multiple consecutive days.
Very good to excellent physical condition is required to safely and fully enjoy this trip.

What’s Included

Professional Local Mountain Guide certified as Wilderness First Responder, Food Handling & Leave No Trace Principles with years of professional and personal wilderness experience and a passion for leading others.
Top-of-the-line tent, backcountry sleeping pad and multi-day backpack, headlamps, utensils and poles.
High quality, synthetic sleeping bag (Laundered after every use- $15 cleaning fee) – or bring your own!
Breakfast, lunch, and 4-course dinner prepared by your guide while in the field.
Wilderness and National park backcountry camping permits.
Bear canisters for food storage.
Water Filtration systems- all water filtered by your guide!
Emergency equipment including an extensive first-aid kit and satellite communication device (InReach Explorer).
For Yosemite National Park Treks: Mandatory 5% national park fee that passes through directly to Yosemite.
A discount of 10% off any TrekSierra trip after your first!

Not Included

Gratuity - Never expected, but if you have a great experience, please consider gifting 10-25% to your guides!
Transportation to your starting point at June Lake Town.
Small cleaning fee for the use of the sleeping bag.

What to Bring / Wear

Sturdy Hiking Shoes - Broken in/Used before with closed toes and grippy tread! No open toe sandals or shoes allowed!
Hiking Socks & Gaiters - Comfortable socks to prevent blisters and small shoe gaiters are helpful to keep rocks and sand from getting into the shoe and causing blisters or cuts!
Layered Clothing - Make sure the clothing is moisture-wicking, lightweight, and fast drying! You may be sweating a lot in the high altitude sun! Also, the weather can change rapidly so having a few easy to remove and add layers always helps (lightweight pants, fleece jackets, insulated vests, lightweight gloves, beanie, and long-sleeve top). No jeans please!
Sun / Rain Protection - Rimmed hat, sunglasses, neck covering (may attach to hat), and UV deflecting long sleeve shirts can all help to combat the harmful and strong sun rays. A poncho or rain jacket along with a rain cover for your bag is important to consider as weather can change quickly in the mountains!
Required Paperwork & ID Cards- Signed medical form if required, waivers, license, etc.
Restroom & Personal Medication Essentials - Extra toilet paper and hand sanitizer is a good idea! If you need certain medications along the hike, please be sure to have them with you.
Cameras & Binoculars - Catch amazing pictures of the scenery and binoculars to spot wildlife from far away!
Reusable Water Bottle (62oz+ / 1.8 L) or Camelback Bladder, Water, & Snacks
Lightweight Gloves & Beanies
External Battery Packs - Make sure to pack fully charged battery packs if you’d like to make sure your cameras or phones remain charged!

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ADVENTURE PROVIDED BY Trek Sierra

FAQs

What is special about Alger Lakes?

Alger Lakes is a secluded alpine basin tucked high above June Lake, known for its deep blue water, dramatic mountain backdrop, and quiet, high-country feel. The lakes sit directly beneath Koip Peak, framed by steep shale slopes and rugged Sierra granite, giving the area a raw, remote atmosphere that feels far removed from busier trails. Unlike lower-elevation destinations, Alger Lakes rewards hikers with a sense of solitude that comes from earning your way up steep terrain and gaining elevation quickly.

What makes Alger Lakes especially unique is its versatility. It works beautifully as a high alpine basecamp, allowing hikers to explore the surrounding terrain, relax by the lakes, or take on the optional summit of Koip Peak. The combination of steep access, high elevation, and wide-open views makes Alger Lakes a standout destination for experienced backpackers looking for big scenery without committing to a long approach.

When is the best time to hike to Alger Lakes?

The best time to hike to Alger Lakes is typically mid-summer through early fall, most commonly July through September, depending on snowpack and seasonal conditions. Because the lakes sit at high elevation, snow can linger well into early summer, especially near Gem Pass and in shaded areas of the trail.

Late summer and early fall often provide the most stable weather, clearer trails, and more predictable conditions. During this time, daytime temperatures are generally comfortable for hiking, nights are cool, and the area sees fewer afternoon storms than earlier in the season. Fall trips may also bring crisp air and changing light, while early-season trips may require snow travel or route adjustments based on conditions.

Is this trip suitable for first-time backpackers?

This trip is not recommended for first-time backpackers. While the trail is well maintained, the route involves steep elevation gain, sustained climbs, high elevation, and multi-day pack carries. Participants should already be comfortable with overnight backpacking, managing their own gear, and hiking multiple days in a row with significant elevation gain. This trip is best suited for hikers who have backpacked before and are looking to challenge themselves in a high-alpine environment.

How steep is the climb to Alger Lakes?

The climb to Alger Lakes is consistently steep, gaining a significant amount of elevation in relatively short mileage. From the June Lake area, the trail climbs steadily past Gem Lake and toward Gem Pass, with long uphill sections that require strong legs and endurance. While there are moments to catch your breath and enjoy the views, the ascent is sustained rather than gradual, which is a big part of what makes this trip physically demanding—and rewarding.

What is the highest elevation reached on this trip?

Without the summit option: The highest elevation reached is at Alger Lakes, which sit well above 10,000 ft (3,048 m) in the high Sierra.
With the Koip Peak summit option: The trip reaches 12,962 ft (3,950 m), just shy of 13,000 ft (3,962 m), making Koip Peak the fourth-highest peak in Yosemite National Park.

The elevation alone adds to the challenge and makes proper acclimatization and pacing important throughout the trip.

Is the Koip Peak summit mandatory?

No. The Koip Peak summit is completely optional. The trip is designed as a basecamp-style trek, meaning you can enjoy Alger Lakes, explore the surrounding basin, or rest at camp while others choose to attempt the summit. Those who do summit will hike with light daypacks, making the climb more manageable and allowing everyone to choose the experience that best fits their energy level and goals.

Will there be stream or lake crossings?

Yes, but crossings are generally manageable and seasonal. You’ll encounter streams and outlets near lakes, especially earlier in the season when snowmelt is higher. Most crossings can be done on rocks or shallow sections, and there are no major river crossings expected. Conditions vary year to year, and guides assess crossings carefully to ensure safety.

What wildlife might we encounter in the area?

The Alger Lakes basin sits in prime high-elevation Sierra habitat. Wildlife sightings are never guaranteed, but hikers may encounter:

Marmots and pikas among rocky slopes
Mule deer in lower and mid-elevation areas
Clark’s nutcrackers and other alpine birds
Small mammals common to alpine basins

Black bears are present in the region, though sightings are less common at higher elevations. Proper food storage practices are always followed to minimize wildlife interactions.

What is special about Koip Peak?

Koip Peak stands out not only for its height but for its position and views. At 12,962 feet, it is one of the tallest peaks in Yosemite and offers sweeping 360-degree views across the Sierra Nevada. From the summit, you can see deep into the backcountry, with vast stretches of ridgelines, valleys, and alpine basins unfolding in every direction.

What makes Koip Peak especially rewarding is how it’s earned—after establishing camp at Alger Lakes, the summit push feels like a true alpine objective rather than just another trail hike. The combination of high elevation, off-trail travel, and expansive views makes Koip Peak a memorable highlight for those who choose to attempt it.

Cancellation Policy

Due to the high costs of outfitter/guide and government permits, all deposits are non refundable. We will attempt to reschedule you with a $100 per person change of date fee. In the unlikely event that TrekSierra must cancel a program you may reschedule for no fee or have your deposit refunded. No refunds will be made due to weather or route conditions. TrekSierra is not responsible for additional expenses incurred in preparing for a trip, including but not limited to: non-refundable airline tickets, equipment purchases, medical expenses, and hotel reservations. TrekSierra strongly encourages participants to obtain trip cancellation insurance. Coverage should include trip cancellation, baggage loss, non-refundable airline tickets, accident/life coverage, and travel days. TrekSierra also encourages participants to purchase medical, disability, life, and rescue insurance. TrekSierra does not provide any such insurance coverage and participants acknowledge it is their own responsibility to acquire insurance for themselves. All fees are due 30 days prior to departure date. Full refunds less a $250.00 registration fee are available more than 30 days prior. 50% refunds are given within 20-30 days of departure. No refunds are given within 20 days of the departure date. All refund requests must be received in writing/email. Late payments may result in the cancellation of a reservation with no refund given. No refunds will be given if any participants cannot complete the trip or end the trip early.