Viskan — Route & Safety Brief

Borås → Åskloster (river mouth) → Varberg · 3 paddlers, single sit-in touring kayaks · departing 4 August

River runs downstream the whole way (~80 m drop over ~100 km). Distances are river-km from the Öresjö outlet (N Borås); Borås centre ≈ km 5. ±1–2 km. Data: OpenStreetMap + SMHI.

1. The route at a glance

2. Day-by-day plan (~6 h/day paddling + portaging)

Effort is front-loaded: 7 of the dams are in the first 50 km, so those days are short-distance but slow. The lower half is longer but easy.

Recommended — 5 river days + 1 optional sea day (beginner pace)

If a day runs long or the group is tired (esp. Days 1–3), stop early. Don't push tired beginners near dams.

Faster alternatives

Same ~100 km and the same 7 mandatory portages — fewer days just means longer, harder days. Both end at Åskloster (river mouth); add the optional sea day to reach Varberg. August daylight is long (~05:00–21:30), which helps the big days. For your beginner group the 5-day plan above is strongly recommended — treat these as fitness/experience-dependent.

4-day — moderate–hard (~22–30 km/day, ~2 portages/day)

3-day — hard, experienced only (~24–38 km/day, ~9–11 h days)

The 3-day plan packs 3 portages into each of two ~38 km days — that's ~9–11 h on the go. Not advised at low August water in loaded touring kayaks, or for beginners. Only take it on with strong fitness and self-rescue confidence.

3. Water level — what to expect in early August

From SMHI's Åsbro gauge (lower Viskan, 1977–2026):

• Early-August median ≈ 13 m³/s near the mouth — under half the annual norm. This is the low-water season.
• Highly variable: recent early-Augusts ranged 1.3 m³/s (2018 drought) to 53 (2023). 27 % of early-Aug days are below 5 m³/s.
• The gauge is near the mouth (whole catchment). The upper river you start on (Borås→Kinna) carries far less — likely ~3–5 m³/s → shallow, rocky, expect wading/dragging.

Consequences: low water is *safer* (gentler rapids) but *slower* and hard on hulls. Bring hull-repair tape and neoprene booties.

Check 3–5 days before departure:

• SMHI Åsbro gauge / Vattenwebb — current flow
• YR.no — rainfall the week prior (Viskan is flashy; rain bumps levels fast)
• If it's been a dry July, consider starting at Kinna/Skene to skip the scrapiest, most portage-heavy section.

4. Potential problems (ranked)

1. Viskafors canyon (km ~22) — 25.5 m fall. The one genuinely dangerous point. Strong intake current *above* the dam: take out well upstream on river-left. Never drift toward the intake. 2. Low water — grounding, dragging, hull wear; slower than the map suggests. 3. The sea leg — exposure, wind, Getterön. Have a hard "end at the mouth" fallback (see §6). 4. Strainers: fallen trees, beaver dams, wire fences across the water — all documented on Viskan. The classic river killer. Slow into every blind bend; never paddle into a strainer — get out and walk it. 5. Rocks everywhere — plastic touring hulls cope; carry repair tape. 6. High banks — landings can be hard; scout takeouts above every dam early.

5. Portage rule for beginners

In loaded touring kayaks at low water: do NOT run any rapid. Line it or carry it. Touring hulls are long and don't turn fast in rock gardens — running rapids is where beginners swim and pin boats. Get out on the correct bank *above* each dam, scout from upstream, carry in relays (3 people = easy).

6. Sea-leg go / no-go checklist (mouth → Varberg)

This is not a beginner leg. Only attempt if ALL are true — otherwise take the car pickup at Åskloster:

• Wind under ~5 m/s, no gust/offshore warning, settled forecast (check YR + SMHI that morning)
• On the water at first light; off before the midday sea breeze
• Everyone has practised (beforehand, on a lake/pool): wet exit, assisted (T-)rescue, bilge pump + paddle float
• Spray decks on, PFDs on, phone in waterproof case; ideally one VHF or PLB in the group
• Stay within ~200 m of shore the whole way
• Group agrees the turnaround rule before Day 6: if it's lumpy at the mouth, you don't go — you call the pickup

Safer alternative: finish the expedition at the river mouth and do the Varberg coast another day from a Kayakomat with a guide.

7. Emergency & admin

• Emergency: 112 (SOS Alarm — police/ambulance/rescue). Non-urgent medical advice: 1177.
• Share your position: keep phones charged (power banks); learn to send a pin / use what3words so you can give exact coordinates.
• Hospitals near the route: SÄS Borås (upper river) · Skene lasarett, Mark (mid-route, Kinna/Skene) · Varbergs sjukhus (lower river & coast).
• Float plan: leave your route + daily targets + this brief with a contact at home; check in from town wifi/signal each day.
• Camping: *allemansrätten* allows one night in most spots — not on private hydro-station land, cultivated fields, or close to houses. See the separate camp/vindskydd sheet.
• Car shuttle: leave one car at the finish (Åskloster, or Varberg if sea-legging), start with the other from Borås.
• Don't drink untreated Viskan water (legacy contamination in sediment) — refill from taps; filter as backup only.

*Sources: OpenStreetMap (Overpass API); SMHI Hydrological Observations (Åsbro st. 2201); Kanotguiden; first-hand Viskan trip reports.*