Bizarrely, at the end I was so toasted I wasn't sure if I'd enjoyed it or not. But I'm going back next week for a second opinion.
I really enjoyed the technical sections and the hurdles. It was billed as 35 minutes but, not knowing that this is a 'guesstimate' I probably went too hard too soon (stop sniggering at the back). I was racing for 40 minutes and when I crossed the line after 7 laps and asked "how many to go?" they told me "Two more" I shouted "BOLLOCKS!"
Thankfully the leaders overtook me halfway round that lap so I got the chequered flag after 8 - and what a beautiful sight it was.
So yes I think I DID enjoy it, but I was 40 minutes at average 183 BPM (with 184 being VO2max zone 5). I really couldn't have given it any more and next time will hold back slightly on the first couple of laps. I was toast after 5 laps. As you can see from the heart trace, I had no choice but to ease off for the last three.
View attachment 652852
I also "
GoPro"ed the whole thing, but have yet to stitch the files together for YT upload.
The foresty sections were a bit "slidey", and got more powdery with each lap, but I managed to stay upright. Foot down a few times. Most of the other people I talked to said they'd crashed a couple of times, which either means I wasn't trying hard enough (see heart trace) or I handled the bike OK (or I'm a pussy). I'll let you decide which when the video comes out.
[Edit to add.] I completely forgot to mention results. I was 27th overall in my race out of 44 starts (all cats). In my category (men 50-59) I was 7th out of 11.
Practise lap video
View: https://youtu.be/RaCzvV2eYQk
First 12 minutes video
View: https://youtu.be/dq3TK1h9oJU