San Juan Solstice 50 Mile.
The San Juan Solstice 50 Mile leaves the Town Park in Lake City, crosses the high ground of the Continental Divide Trail and comes back to town, topping out at around 4,000 metres. Preparing for it means preparing for one thing above all: still being able to run in thin air after two very long climbs.
San Juan Solstice 50 Mile 2027: Course, Elevation & Route Profile
The loop starts at a little over 2,600 metres and stays gentle for only a few kilometres. From km 4.5 the trail heads for Alpine Gulch and climbs for ten kilometres, close to 1,200 metres of ascent without a break. What follows is no recovery: the route drops more than 1,000 metres to Williams Creek, where an aid and drop-bag point sits at mile 15.7.
The second big job starts at km 29. Eight steep kilometres rise past Carson (mile 21), and after a short pause another 300 metres of climbing lead to the high point of the day around km 40. All told you stay above 3,500 metres for more than 20 kilometres in a row. High trail alternates with jeep road, there are streams to cross, and the organiser has contingency arrangements ready for bad weather.
From the Continental Divide Trail the course loses 600 metres down to Sawmill Park (mile 40), and it would be easy to think the work is done. It is not: right behind it come the steepest sustained metres of the day, 3.5 kilometres at almost 15 percent. Only then does the route fall for good towards Lake City, steepest a few kilometres out, and close the loop in town.
| Start | Length | Ø | Max. | Gain | Cat. |
|---|---|---|---|---|---|
| km 3.5 | 0.8 km | 5.3 % | 14.6 % | +41 m | — |
| km 4.5 | 10k | 12 % | 31.2 % | +1,196 m | HC |
| km 29.2 | 8 km | 11.6 % | 27.6 % | +926 m | HC |
| km 37.4 | 2.6 km | 11.9 % | 23.8 % | +306 m | Cat. 3 |
| km 41.4 | 0.8 km | 6.4 % | 15.3 % | +53 m | — |
| km 51 | 2.1 km | 6.8 % | 13 % | +140 m | Cat. 4 |
| km 57.5 | 0.7 km | 6.8 % | 11.7 % | +48 m | — |
| km 64.8 | 3.5 km | 14.6 % | 23.2 % | +510 m | Cat. 2 |
Climb categories follow the road-cycling convention and rate the terrain itself (length and gradient) regardless of sport: Cat. 4 marks the easiest rated climbs, Cat. 1 the hardest, and HC (hors catégorie, “beyond categorization”) is reserved for the most brutal ascents. Short climbs below the Cat. 4 threshold stay unrated.
How to pace San Juan Solstice 50 Mile.
Start under control
Only about a tenth of the course is flat, so plan by effort rather than pace. On the first climb, with pitches near 30 percent, a brisk hike is the right call from the start, all the more because you begin above 2,600 metres and the air runs short before your legs complain.
Hold your rhythm
The biggest trap comes early, on the descent to Williams Creek. After that first hard climb it invites you to let go, and that is exactly where you spend the quads you will miss after km 40.
Spend what is left
The race is decided between Carson and Sawmill Park. If you can still jog steadily up high, you gain more time there than anywhere else; if you overspent, that section becomes a walk. Eat and drink to a plan at altitude, not by feel. And save something for the ramp behind Sawmill Park: after 65 kilometres those 500 metres of climbing cost far more than their length suggests, and the final descent still needs working legs.
Training plan for San Juan Solstice 50 Mile: 12-week build
Build the base
For age-group athletes this is a day of roughly 12 to 16 hours, almost entirely aerobic. Because the ground keeps switching between steep up and steep down, no even rhythm ever settles in: the load comes from duration, altitude and hour after hour of muscular work on gradients, not from speed.
Train race pace
Three phases set the priorities: the second big climb from km 29, which leads towards 4,000 metres on tired legs; the high section after it, where you still need to be able to run; and the ramp behind Sawmill Park. Long sessions that put the hardest climbing into the final third reflect that better than evenly spread hill runs.
Rehearse the course
Practise brisk hiking on slopes of twelve percent and steeper until it feels like a gait of its own, and schedule long descents on fatigued legs. With more than 3,600 metres of descent and a steep last drop towards Lake City, your quads often decide how the last hours go.
Arrive fresh
Altitude cannot be improvised on race day: the course never drops below 2,600 metres, so plan training days up high or an early arrival. Test shoes and socks after stream crossings as well, because wet feet stay with you through the day. The Carson and Sawmill drop-bag points are about 30 kilometres apart, right across the highest part of the course. Whatever clothing and food you need up there has to leave Carson with you.
Courses
Download the San Juan Solstice 50 Mile course as a GPX file for your watch or bike computer.
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Everything about San Juan Solstice 50 Mile.
How long is San Juan Solstice 50 Mile?
San Juan Solstice 50 Mile is 80.47 km long. That distance shapes how much aerobic endurance, pace durability, and race-specific work belong in the training plan.
How much elevation gain does San Juan Solstice 50 Mile have?
San Juan Solstice 50 Mile has around 3,630 m of elevation gain over 80.47 km. That affects pacing, muscular load, and preparation for late-race sections.
What is the route profile of San Juan Solstice 50 Mile?
San Juan Solstice 50 Mile is classified as Mountainous, averaging 46.1 vertical metres per kilometre. 9% of the route is flat, 21% climbs moderately (2 to 6%) and 26% is steeper than 6%.
What climbs does San Juan Solstice 50 Mile have?
The hardest climb of San Juan Solstice 50 Mile starts at kilometre 4.5, runs for 10 km at an average of 12% and gains 1,196 metres. Cycling-convention rating: HC. 8 climbs are mapped in total.
Is San Juan Solstice 50 Mile a loop course?
Yes, San Juan Solstice 50 Mile is laid out as a loop: start and finish are in the same place.
Is there a GPX file for the San Juan Solstice 50 Mile course?
Yes. The San Juan Solstice 50 Mile course is on this page as a free GPX download — ready to import into Garmin, Wahoo, Komoot, Strava or any other app that reads GPX.
How should I prepare for San Juan Solstice 50 Mile?
Preparation for San Juan Solstice 50 Mile should account for 80.47 km, 3,630 m of elevation gain, current training load, and available training time. An adaptive plan helps place key sessions without ignoring recovery and real life.
What pacing strategy works for San Juan Solstice 50 Mile?
The pacing strategy for San Juan Solstice 50 Mile should reflect 80.47 km, 3,630 m of elevation gain, and your current fitness. Start controlled and keep margin for sections where the profile or fatigue makes target pace harder.
When does San Juan Solstice 50 Mile 2027 take place?
San Juan Solstice 50 Mile 2027 takes place on June 19, 2027.
Where does San Juan Solstice 50 Mile 2027 take place?
San Juan Solstice 50 Mile 2027 takes place in Lake City, United States.
How do I register for San Juan Solstice 50 Mile?
Registration runs through the organiser: sjs50.com. YOUB shows you the course, elevation profile and training plan for your preparation.
