Ever since its inception a few years ago I’ve been aware of the “Red Rock Challenge”, a weekend-long event in October that offers a multitude of different trail run and mountain bike races; near my home in the south of Luxembourg. After I covered part of the event for the newspaper in 2014 and 2015, I told myself “one day, I’ll compete in one of those races”.

Since I’m at the tail-end of my Thirties (39 years old in late October), I realize more and more that for athletic endeavors, “one day” is a bad perspective; and that the best way to take part in a challenge is not to feel overwhelmed and wait for years for the right opportunity, but to just commit to it and potentially be pleasantly surprised by the outcome.

So when I looked at the competition schedule for this year’s Red Rock Challenge and found that they offered a duathlon (bike-run-bike), it would have been easy to dismiss it as being too hard, or that I hadn’t trained enough for it. Conventional wisdom would have steered me towards either just doing a trail race or just a mountain bike ride. But challenges are supposed to be, well, challenging. So I signed up for the duathlon event, which was advertised as 21.2km of MTB, 9.6km of trail running and 18.2km of MTB.

Once I had committed to the idea, it was already too late for in-depth preparation. I only had two weekends left, which I both used to do recon on the mountain bike course – doing the first 10km one weekend, and then biking around 35km of it the next one. The opportunity didn’t come for me to even looked at the run course, but I figured that an hour of running would be the least of my worries if it was sandwiched between 40km of hard mountain biking.

Leg 1 – 20.5km MTB ride

I lined up on a fairly chilly Saturday morning with around 180 people. While about 80 of these had signed up for the duathlon like me, an additional 50 people had signed up for the easier option of just doing the mountain bike course, while 37 teams were doing the duathlon as a relay.

Since I didn’t really know what to expect from either myself or the competitors, but guessed that my endurance and skills were less than average, I positioned myself about two thirds back from the starting line. As we set off at a less-than-maximum pace over both paved surfaces and gravel for the first 1.5km, I was moving up a few positions, but still very much respectful of what would still come.

On the first climb, now on a slightly narrower forest path that only allowed people to travel two abreast, I began to regret my timid starting line positioning. There were several people in front of me who were considerably slower than I would have been on my own. A handful of people were already fighting gear ratios or had no climbing legs at all.

After 2.6km and about 80m of elevation gain, we crossed Rue de Hussigny. The next few kilometers were quite technical for an entry-level hobby biker like me. We faced a descent with a few 180° turns, two or three steeper ascents, and some undulating single track in between. On the ascents, again, I found myself stuck behind people pushing their bikes. On my own I’m not sure I would have managed to stay clipped in at every single one of these spots, and my heart rate was quite high even while getting slowed down; so maybe in ideal conditions I wouldn’t have been much faster. But still, I was getting slightly frustrated. Fortunately, before too long the field had thinned out somewhat, and the average width of the trails had widened to the point that passing was easier.

After around 10km we came to our first major road crossing, just outside the eastern outskirts of Differdange. Volunteers were stopping the cars, so there was no slowdown. On the other side of the road, we climbed slowly, reaching the path formerly used by small-track mining trains and followed that through a short tunnel. Since I’d been here the previous weekend, I knew that the tunnel surface was smooth, or otherwise this would have required a careful crossing – it was very dark and potential obstacles would have been difficult to spot.

After going through the tunnel we turned 360° and crossed the tunnel on a higher level. The trail kept going up and my heart rate reached 177, near my maximum. I knew I had to slow down a little since a heart rate this high was not sustainable in the long term. Fortunately, there soon came two descents that offered a bit of a breather.

54 minutes into the race I crossed another road, this time without seeing any traffic. Next up was a bumpy traverse of a field over a grassy trail that allowed to take in what competitors were up ahead. It’s easy to pick at least the nearest one and set yourself the target of catching him, but in reality the race had gone long enough for the slow riders to filter out, and whoever was in front of me wasn’t an easy catch anymore. I still managed to overtake a rider every few minutes, but most times I didn’t even know if any of these guys were even in my own race (duathlon) or just doing the MTB part.

The next quarter-hour was spent on an anti-clockwise loop of Titelberg, most of which I rode without seeing anyone either in front or behind me. This part of the route was quite interesting visually and ended with a technical down-hill. I’m sure that more experienced bikers breezed down to Fond de Gras without a second thought, but for me it was a small victory to make it down almost without walking the bike.

My first MTB leg took me 1:11:33 according to the official timing. This put me in 44th place out of the 70 people that finished.

Leg 2 – 9.3km trail run

Fond de Gras was where we switched from bike to trail shoes for the second leg of the race. This would be my first duathlon transition, ever. With this in mind, I promptly forgot to press “lap” on my Garmin, and thus wouldn’t have any means of tracking how much time I spent in the transition zone. After getting off the bike, I was surprised to find that it took substantial mental effort to deduct that my Number 107 bib meant I was supposed to look for my drop bag in the row that was marked “100-120” (I think). And of course as I moved past the bags and bikes of other competitors I missed my own bag and upon reaching the end of the row had to retrace my steps. Great.

I got rid of my helmet, biking glasses and gloves; and put on my Salomon Speedcross 3 – their “speed laces” probably saved me a few seconds over tightening a traditional shoe. And then I finally remembered to press “Lap”. Although I hadn’t tracked the duration, my transition took me much longer than the handful people who arrived shortly behind me and were now ahead of me.

I set off running at around a 5:30 min/km pace, unsure of how my legs would hold up after 75 minutes of hard biking. Surprisingly, they held up quite well for as long as the trail was straight or on a minor down slope. But on the first incline, somewhere after 3km, I quickly switched over to a power hike. By this point, I’d been caught and passed by a few people. As the trail flattened out again, I resumed running. A female athlete had been behind me since the transition, and when on the next uphill my legs started cramping, she offered a few words of support. Two spectators  who were nearby let me know that this was the highest point of the course. They weren’t quite right, but in that moment the cumulative support somehow flicked a switch and I  managed to make the leg cramps fade away while also getting back some speed into my legs. I still wasn’t going much faster than a 6km/min pace, but it was much better than walking.

Even though the first kilometers had felt glacial, I was happy to get closer and closer to the transition zone again. The last half kilometer as we got closer to the transition zone felt a bit uncertain, with trails going off in different directions and spectators walking everywhere, but I followed the markers and ended up at the transition zone again. The run took 0:55:31 according to the official timing. My GPS time puts it at 53:55. At this point, the official results put me in 52th place; I therefore must have lost 8 places, but only remember being passed by 3 or 4 people; which means 4 others had faster transitions.

Leg 3 – 18.6km MTB ride

My second transition was slightly better than the first, even though I realized afterwards that I breezed past the feed and water station without taking anything. While I had munched on a power bar during the run, and had drunk about two thirds of my water during the first bike leg; I would later regret that I hadn’t kept up with my hydration needs as well as I should have.

Straight out of Fonds de Gras was another climb. I was starting to feel the cumulative effort and felt slow, but still hit a heart rate of 172 on the way up. The trail mellowed out through the forest, then briefly followed a road (just for one bend) before rejoining the forest again.

Around this point, I started to suffer. My lower back wasn’t happy, and in retrospect I’m not sure whether it was my kidneys that were complaining because they were starting to feel the effects of dehydration (2 hours into the race, and I’d consumed just barely over half a litre of fluids), or if it was just my lower back muscles letting me know that, well, I had not enough lower back muscles to adequately support my body through all the movements of a 2+ hour effort over rough terrain.

With so much of my mind on just moving forward as efficiently as still possible, my memories of the next kilometers are somewhat vague. I know that even though the amount of competitors had thinned out, at some point I reached one local competitor whose name (on his triathlon suit) felt vaguely familiar. I passed him, but he held on and stayed behind.

Some time later, with mostly easy riding, we had to cross a small wooden bridge. We’d both caught up on another rider, who slowed down smack in the middle of the bridge. I changed to a lower gear, somehow my gears got caught up and the chain jumped. The sudden loss of forward movement and a foggy brain had me leaning to the left. I would have fallen straight into the water below if there hadn’t been a wooden board that I was able to lean against and steady myself. I swore, successfully cleared the bridge and then let the other guy go past.

The end was coming nearer and nearer. Thankfully, there were no more big climbs, but the trail was undulating and there were quite a few twists and turns that required full concentration.

A little later, I saw two wheels sticking straight up. I’d caught back up to the last rider, and apparently he’d fallen and was now trying to unclip and get himself off the ground. I asked if he was alright – he was, so I continued on.

Somewhere along the way I passed a few more people, and got passed once or twice, but mostly there was nobody around me.

Finally, I reached the the parking lot near the forest where the single trail had started at the beginning of the race. From here on out, the descent would follow the same path that we came up on. Road markings were a little misleading however – or at least, I couldn’t quite wrap my head around it and got confused. Soon though, I realized that I was indeed on the correct path and needn’t worry about navigation anymore.

Maybe a kilometer from the finish line, another rider passed me. He said something, but I had a bad case of tunnel vision; and didn’t understand a thing. With my mind that foggy, it was time for the finish line, which fortunately was approaching.

I biked over the red railway bridge and across the line. The second MTB leg had taken me 1:07:53. I finished that bike split in the 34th fastest time of all duathlon competitors.

Overall ranking, and conclusion

I finished 40th out of 70. My final time was 3:14:55. The race was won in 2:22:37, with the first Luxembourgish competitor coming in at 2:34:34.

The race was one of the hardest competitions I’ve done, mostly because of the long time with a high sustained heart rate. My average heart rate was 164bpm.

A lot of things went right during the race. My bike, a Trek hard-tail (front-suspension only) performed flawlessly. I suffered no punctures, and had no gear issues. I didn’t fall (barely). My clothing choices (cycling shorts and two layers on top) were OK. While I was too warm occasionally, just one layer of clothing would probably have been too chilly. I didn’t drink enough and a few more calories would probably have provided me with more energy during the end of the race. A slightly more optimistic starting line positioning might have kept me out of traffic jams on the first few kilometers. Overall, I’m really happy with how the race unfolded and if I manage to train at least as much next in 2017, I wouldn’t mind lining up at the start line again.

Categories: CyclingMTBRace report

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Race report: Red Rock X-Challenge 2017 (MTB/trail duathlon) – ckemp.com · October 23, 2017 at 1:26 pm

[…] I’m not like that. After competing at the Red Rock X-Challenge MTB/trail duathlon in 2016 (see my 2016 race report), I signed up for this year’s edition about one month in […]

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