San Diego 5 Peak Challenge in Heat

San Diego 5 Peak Challenge in Heat

Day Hiking in Summer: How I Tackled the 5 Peak Challenge in 92°F Heat

 

Whether you're gearing up for the San Diego 5 Peak Challenge or just heading out on a full-day trek, packing the right gear is everything. I recently completed all five Mission Trails peaks—Cowles, Pyles, Kwaay Paay, North Fortuna, and South Fortuna—in one hot July day. Here’s exactly what I wore, packed, and highly recommend for staying safe, fueled, and (mostly) sane on the trail.

In the middle of peak summer heat (yes, July!), I set out to hike five peaks in one day under the San Diego sun. With temperatures reaching 92°F, it was equal parts grit, sunburn, and snack strategy. And yes—I survived. Here's the full story of how it went down.

Know The Route

The worst that can happen during a strenuous hike is getting lost. For day hikes, you can typically use the AllTrails app or Gaia. There are two useful links that can help you navigate this challenge.  See platoaroute.com and search "Mission Trails 5 Peaks Route".

You can also obtain the link from Alltrails.com by searching "MTRP Five Peaks Loop"

 

Map courtesy of Plotaroute.com and Alltrails.com. Used for informational purposes only.

I am also linking the Mission trail Regional Park 5 peak Challenge Map to prepare you for your day hike.

Mission Trails 5 Peak Challenge Tackled In a Day:

  • Cowles Mountain
  • Pyles Peak
  • Kwaay Paay
  • North Fortuna
  • South Fortuna

Time: 9 hours 8 minutes
Distance: 16 miles
Elevation Gain: 3,983 ft
Temperature: 92°F

Cowles Mountain Peak, San Diego CA

 

 

Starting at 5AM

During the summer time, Mission Trails become very hot and dry. It is always best to try to beat the heat by starting as early as possible. At 5AM, the trail was quiet, the air was cool, and we were full of caffeine and hope. Cowles Mountain was our first summit—and at sunrise, it was peaceful and crowd-free during this time.  Expect 

By Pyles Peak, we were sweating, but still smiling. So far, so good.

Then came Kwaay Paay—short but brutally steep. It’s the kind of climb that reminds you your quads have feelings too.

Midday Madness

The heat kicked in hard by North Fortuna. I found myself eyeing lizards for shade-sharing opportunities. My hydration pack became a lifeline.

South Fortuna was the final peak—my legs were toast, my snacks were low, and I began questioning whether peanut butter was a good trail decision.

South Fortuna Trail, San Diego, CA

Lessons in Route Planning

Completing all five peaks in one day is no small feat. It takes stamina, strategy, and a good sense of humor once the legs start to rebel. We began our hike with Cowles Mountain, which felt like a solid starting point: steady incline, early sunrise views, and relatively short distance.

But looking back, I’d definitely adjust the order.

If I could redo the route, I would have started with Kwaay Paay—the steepest and most unforgiving climb of the day. It’s short but intense, with very little shade and quick elevation gain. Tackling it with fresh legs and full energy would’ve made a world of difference.

By the time we actually got to Kwaay Paay later in the hike, fatigue had already set in, and that short, steep climb hit like a wall. Mentally and physically, it was rough. From there, I would have moved on to North Fortuna, then South Fortuna, and ended with the Cowles → Pyles Peak combo when the sun was higher and the trails were more open and gradual.

This challenge isn’t just about finishing—it's about finishing strong. And how you plan your route matters just as much as what’s in your pack.

 

Cowles Mountain Trail, San Diego CA

 

Tips on Hiking Essential Pack for Day Hiking for a Hot Day:

Whether you're tackling a major challenge like San Diego's 5 Peak Hike or just getting outside for a few hours, the right gear can make all the difference between an amazing experience and a miserable one.

Here’s what I personally pack and wear to stay comfortable, safe, and trail-ready—especially when hiking in hot July conditions like our recent 5 Peaks adventure.

First Aid & Hygiene

Start with a personalized first aid kit. Mine includes:

  • Compact bandages & antiseptic
  • Tylenol or other pain relievers
  • A few sanitary pads (helpful for more than just periods!)
  • Wet wipes – a lifesaver when you're overheated
  • Toilet paper + a plastic bag for trash

Sun Protection

Hot weather hikes require sun defense. My go-to items:

  • Sunscreen, chafing cream, and Chapstick
  • Sun hat, sunglasses (preferably polarized)
  • Sun umbrella (I bring mine every time)
  • Cooling towel or portable fan
  • UPF-rated clothing or sun gloves

 

 Insect Protection

Even if bugs aren't expected, I always apply bug repellent just in case. You never know when they’ll show up.

Navigation & Safety

Getting lost is not part of the plan. I use:

  • AllTrails or Gaia GPS for trail navigation
    (Links were pinned in the group chat!)
  • Garmin inReach Mini – for satellite communication in no-service areas
  • Portable charger – never hike with a dying phone
  • Whistle or knife – especially if separating from the group

If you are a new hiker, avoid hiking along. If you don’t have a satellite device, provide a loved one or friend with your phone number so they can verify your safety.

Trail Snacks & Fuel

Even short hikes can work up an appetite. I always bring:

  • Granola bars, energy chews, fruit, and sweet potato chips
  • Homemade protein balls  (  oats, PB, honey, flaxseed or chia, chocolate chips, protein powder)
  • Homemade rice balls (with honey, nuts, roasted seaweed, and fruit!)
  • Energy gels/chews like Clif Bloks – lightweight and effective
  • Extra snacks and water for the car post-hike

 

Hydration Tips

  • Water = everything. Dehydration sneaks up fast, especially in heat.
  • Here’s what I bring:
  • Hydration Pack and bladder – for hands-free sipping
  • Collapsible bottle – saves space after it's empty
  • A bottle of frozen juice as a mid-hike treat
  • Electrolytes: NUUN, Liquid I.V., DripDrop, Skratch, or Tailwind

 

 

Pro Tip: I always carry at least 2 hydration sources and electrolyte backups. 

 What to Wear: Comfort > Cute

Please avoid cotton—especially for socks, underwear, and shirts. Cotton traps sweat, causing chafing and discomfort.

Instead, wear:

  • Wool socks – I swear by mine (blister-free!)
  • Tech shirts (polyester or merino wool blends)
  • Shorts or hiking leggings (light and breathable)
  • A light hoodie or long sleeve for layering
  • Cooling cloth (I love my Frogg Toggs towel)
  • Choose clothing based on your personal sun tolerance, but be ready to shed layers as the day heats up.

Optional but Helpful:

  • Trekking poles – helpful for knees and balance
  • Knife or protective device – especially if hiking solo or separating from group

 Gear That Got Me Through

 Would I Do It Again?

  • In a heartbeat (after a nap and maybe an ice bath).
  • The 5 Peak Challenge isn’t just a physical test—it’s a reminder of how far you can go with the right mindset, the right gear, and maybe one more snack than you think you need.

Final Tips:

  • Start early (we hit the trail at 5AM)
  • Hydrate aggressively
  • Don’t skimp on sun protection
  • Bring a buddy—it gets real out there
  • Celebrate every summit—especially the last one
  • Whether you’re gearing up for the 5 Peak Challenge or your next local hike, we’ve got the trail-tested essentials to keep you going strong.
  • Shop our hike-ready gear →
  • Stay bold. Stay hydrated. Hike spicy. 


– Elizabeth

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