If you are reading this in April, you have time to summit a 14er this summer.
That is not encouragement. That is a schedule. The math works out. But only if you start now and match your peak choice to the time you actually have, not the time you wish you had.
The Four Training Windows
Not all 14ers require the same preparation. And not all April timelines lead to the same destination.
6 to 8 Weeks: Achievable with the Right Peak
If you are already active and comfortable walking for 60 to 90 minutes at a brisk pace, six to eight weeks of focused training can get you to the summit of one of Colorado's most forgiving 14ers.
Coming in, you need a base of regular cardio, healthy joints, and no significant injuries.
You need to build sustained uphill endurance and the ability to carry a 10 to 15 pound pack for 5 to 6 hours.
10 to 12 Weeks: The Sweet Spot for Most Beginners
Ten to twelve weeks is enough time to take someone with a modest fitness base and prepare them for a solid Class 2 14er. This is the window most people in April are working with for a late July or early August summit.
You have time to build a real aerobic base, practice loaded hiking, and complete at least two multi-hour training days before your trip.
13 to 16 Weeks: The Full Build
Sixteen weeks gives you the most room for gradual progression and recovery weeks. If you are starting from a lower fitness level or have had previous injuries, this window matters. A late July or August summit is easily within reach.
The 13-week training plan is designed for this scenario: a structured week-by-week program that builds from short walks to summit-ready conditioning.
Under 6 Weeks: Not the Summer for a 14er
If you have fewer than six weeks and are starting from scratch, this summer is probably not your year. That is not a reason to give up. It is a reason to plan a fall or next-summer trip and build the right base.
A rushed training approach is how people get hurt on the mountain. Give yourself the time to do this properly.
Match Your Timeline to a Peak
Your training window determines which tier of peaks is realistic.
Tier 1: 6 to 8 Weeks of Training
These peaks are Class 1 with clear trails, moderate mileage, and manageable elevation gain. They are the right starting point for anyone who needs to be summit-ready in under two months.
Best picks:
- Mt. Bierstadt: 7 miles round trip, 2,850 feet of gain. Well-maintained trail, excellent for beginners. Trailhead at Guanella Pass at 11,670 feet gives you a head start on elevation.
- Quandary Peak: 6.6 miles round trip, 3,360 feet of gain. One of the most popular beginner 14ers in the state. Clear trail, minimal navigation required.
- Mt. Sherman: 5 miles round trip, 2,300 feet of gain. The shortest and lowest-gain option on this list. Ideal if your timeline is tight.
Tier 2: 10 to 12 Weeks of Training
These peaks have more mileage, more elevation gain, or a bit more trail complexity than Tier 1. They are still beginner-friendly but reward the extra weeks of preparation.
Best picks:
- Grays Peak via the standard route: 8.6 miles round trip, 3,000 feet of gain. You can tag Torreys the same day once you are comfortable with Grays.
- San Luis Peak: 14 miles round trip, 3,300 feet of gain. Long but entirely non-technical. Good for people who want a wilderness experience over a crowded trail.
Tier 3: 13 to 16 Weeks of Training
Longer mileage, more remote trailheads, and some peaks with more exposure or off-trail travel. These are still within reach for a well-prepared beginner, but they demand the full build.
Best picks:
- Handies Peak: 10.7 miles round trip, 2,900 feet of gain. Outstanding views in the San Juan range. Worth every extra week of training.
- Sunshine Peak: 8 miles round trip, 2,900 feet of gain. Accessible via the same trailhead as Redcloud, which many people tag on the same trip.
An April-to-August Training Calendar
Here is what a 16-week build looks like when you start in early April and target a late July or August summit.
| Weeks | Phase | Focus | |-------|-------|-------| | 1 to 4 | Base building | Three to four days per week of cardio, 30 to 45 minutes. Add one day of stairmaster or incline treadmill. | | 5 to 8 | Load introduction | Add a light pack (10 lbs) to two sessions per week. Extend one weekly session to 60 to 90 minutes. | | 9 to 12 | Volume peak | Stairmaster sessions at 45 to 60 minutes. One long day of 2 to 3 hours with 15 to 20 lb pack. Hill repeats twice per week. | | 13 to 15 | Maintenance | Hold fitness, reduce volume by 20 percent. Continue one long day per week. | | Week 16 | Taper | Cut volume in half. Keep one moderate session. Arrive in Colorado rested. |
The full 13-week training plan walks through each of these phases in detail, with specific workouts for each week. If you are starting in April for an August summit, you can run the full 13 weeks and still have a buffer week before your trip.
When to Book the Trip
One decision stalls people more than any other: they wait to book the trip until they feel ready. By that logic, many people never book.
Book the trip now. Having a fixed summit date is the most effective training motivator you have. When you know the date, every session has a deadline attached to it.
If you are targeting early August, book your flights and accommodations before the end of April. Late July and August weekends at popular 14er campgrounds fill up faster than most people expect.
What About Arriving Early for Acclimatization?
For sea-level residents, plan to arrive in Colorado at least two full days before summit day. Three days is better.
Spend your first day resting at Denver's elevation (5,280 feet). On Day 2, drive to a campground or town above 9,000 feet and take a short hike. This acclimatization time matters more than any single training session in the weeks before the trip.
The sea-level training guide covers the full acclimatization protocol, including hydration schedules and altitude sickness warning signs.
Start This Week
April is not too late. April is actually ideal.
Pick your tier, choose a peak, and start the first week of training. The 13-week plan is built for exactly this moment. You can run through Week 1 this week and be sixteen weeks into a real training build before your trip.
The mountain is not moving. Neither is the calendar. Start now.