This has its genesis in two threads on the Bearbones forums: the North Peak 100 and the Strictly local threads.
When Shaf posted up his NP100 I thought it was a good idea and worked out a local loop in the southern Dales of similar length but it didn't really feel consistent and then the second lockdown started so it got shelved.
Craig's "Strictly Local" ride around the city limits of Aberdeen was interesting. Locally the boundaries of North Yorkshire, the largest county in England and Wales would be way too big to fit within the current guidelines. Our local authority area, Craven, would also have a large boundary, not really doable in a day. As a "rural" sort of chap, human imposed boundaries didn't really sit well with me, a more natural solution would be better.
A short ride last weekend gave the solution: the watershed of the upper River Aire. A bit of searching came up with this: https://environment.data.gov.uk/catchment-planning/OperationalCatchment/3484, pull the bottom end up to Steeton/Silsden to avoid Keighley (if you've been there, you'll understand), onto bikehike and plot a route that follows the watershed as closely on legal RoWs as possible and I ended up with around 108km. Mostly road and stone track there were just a few potentially boggy sections. Very little technical terrain - the descent of Stockdale Lane being the hardest.
With fine weather forecast I decided to head out yesterday for a "midweek" hit. I rolled down to the "start" at Steeton & Silsden railway station but since I met the route a little before that and hit the lap button on the GPS at that point. The roundabout by the station was thankfully quiet and into Silsden before the long drag up and over to Draughton. Draughton's phone box is one of those that have been repurposed, in this case as a book club, it made national headlines a few years ago when it was vandalised.
Down to the A59, crossing this can also be worrying as it's a fast road with an overtaking lane at this point, then into Halton East which according to my unofficial schedule was to be my first hour point but I was ahead of that. The first off-road section will be familiar to those who've done the YD300 & YD200 routes as it's the last downhill section. A bit harder going uphill! The last thirty metres to the gate is the hardest and reaching it marks my hour point. The next section leading up to the road is the first boggy section but I'm in luck - the farmer has filled in all the deep puddles and it's pleasantly straightforward.
Not so pleasant is the strong wind that greets me when I get to the road, it turns out I'll be riding straight into this for the next three hours or so. The climb up and over Barden Moor is taken steadily, no need to burn matches at this point. Two weeks ago much of this track was sheet ice and we had to ride on the moorland to the side, today it's just slightly damp.
The climb over the moor is straightforward but harder work than it should be because of the wind. Even the start of the descent needed pedalling rather than a straight freewheel.
This gate was frozen in place a couple of weeks ago, the ice was about 30cm deeper than the water level seen here.
I'm still ahead of schedule at Hetton but the first "boggy" section slows me down. Normally it's ridable but I have to walk a couple of hundred metres due to the mud caused by the farmer out feeding stock, just no traction so I'd end up spinning comically at a standstill. The subsequent rocky track is fine as is Boss Moor which isn't as damp as I expected and the bit by the old barn hasn't been churned up too much by the cattle so is ridable with a bit of oomph.
Once I'm onto Mastiles Lane the going becomes firmer but the wind is pushing me back, slight downhills where you'd normally feather your brakes need hard pedalling. My third hour mark comes and goes but I'm now well "behind" schedule. I get some respite from the wind as I pass through the trees around Malham Tarn but then it's back into it as I head to the last big climb for a good while which leads to the top of Stockdale Lane.
I'm actually a bit cold by now - the temperature is nowhere near the forecast 10/11C and the wind is making that feel even cooler. My level of output is only just enough to stave things off. As soon as I turn east at the foot of Stockdale Lane the effective temperature soars and I begin to warm. The next bit is one of those RoW anomalies - the BW just stops in the middle of nowhere. There are plans to link everything up and local riders have used it for years without problem, the last time I rode it I met the farmers and had no hassle so I've no problem in including it.
Back on the road at Otterburn it's easy going to Coniston Cold and the second crossing of the A65, again relatively quiet. I'm riding through the next set of fields when there's a regular ticking from my back wheel, the rear brake pads have worn through, I'll fix it when I get to the next road. Unfortunately I don't have the right sized hex bit to undo the retaining bolt so I'll have to do the rest of the route with just the front brake, luckily there's only one steep descent remaining to deal with.
Another stony track leads across to the the A59 (again) but no need to cross it as I drop down to the Leeds Liverpool canal and pass under it. The canal is followed, muddily, as far as the Pennine Bridleway in Barnoldswick then it's the next big climb up Weets. Six hours ticks by as I start the climb, my unofficial schedule had me at the top by now. The climb is steepest at the start but then just seems to drag on and on. The last section to the next road is the last of the boggy bits, my rear wheel grinding at the brake pads that aren't there.
From here to the end is nearly all road but I'm debating whether to modify the route slightly and just follow the main road for a bit rather than a long climb on a minor road. In the end I decide to stick to the planned route. After Foulridge there's a ford to negotiate, well I say ford, it's more like the road follows a river bed for 200 metres, it's possibly the longest ford in Britain!
The ford ends around two corners just before the trees!
A long road uphill then a long road back downhill lead to some lanes near home that I don't remember ever riding. I pop out on the A6068, it's quiet at this time of day so straight across and onto ...
The last section - I've only ridden some of this in the opposite direction so make one or two minor navigation mistakes but then it's one of the very few bits of the route I'd not ridden before and it becomes a really steep downhill! With only one brake it's a bit sketchy. Fortunately it soon eases off and after a couple of small fords it's a steady climb up the other side.
Eight hours sees me at Keighley Tarn, it's nearly all downhill from here, just one off-road section to finish things. The light is going and with it the heat and I'm getting properly cold, no heat being generated. I turn off for the final bridleway and it's there's an uphill to reach it that I've forgotten about. The true last descent appears and sunglasses are inappropriate under the trees in the gathering gloom. The road leading down to my finish is really rough as it's made up of sleeper sized lumps of stone.
I debouch onto the main road next to the chippy along with a socially distanced queue. I hit the lap button 8hrs18mins. I ring Cath, turn on lights and head (uphill) back home.
So there you have it: The Aire Watershed, 110km with 2400m ascent. I was on a rigid 29er but given the road-track-field distribution it should be perfectly fine on a CX/gravel style bike, even more so if it was a bit drier. The route is 100% ridable, no hike-a-bike sections, though obviously a little conditions dependent - I walked about 300m in total because of boggy ground. At a guess there’s 50km of road, 50km of track/gravel & 10km of “rough” - if you use Komoot then it might give slightly different figures but the proportions aren’t far off. There aren't many facilities between Silsden at 2km and East Marton at around 70km:
2km Lots of shops in Silsden.
71km Cafe at East Marton.
76km Cafe at Greenberfield locks
77km Shops off-route in Barnoldswick
86km Shops and pubs in Foulridge
92km Pub at Black Lane Ends
109km Chippy and shop in Eastburn
Water might also be a problem since the section from Hetton round to the bottom of Stockdale Lane is on limestone so not many surface streams.
If you want the GPX and route notes see the first post in this thread.