River
Alz
63 km from source to mouth · Germany.
GermanyFlows into Inn
In numbers
Length
63km
Average flow
53m³/s
Basin
2,197km²
Drop
161m
from 515 m to 354 m
Country
1
The journey
From source to mouth
63 km of river and 16 stops on the way: 12 towns and cities on its banks, dams, bridges and the tributaries that feed it.
- 0 kmSourceat 515 m
- 1 kmChiemsee75 km²
- 5 kmSeeon-Seebruck4,513 people
- 5 kmKlostersee0.3 km²
- 14 kmNaturwehr in der Alz und Alzhang NW von Altenmarkt
- 17 kmTrostberg an der Alz11,676 people
- 23 kmTacherting5,704 people
- 26 kmEngelsberg2,801 people
- 27 kmTrauntributary
- 29 kmGarching an der Alz8,796 people
- 33 kmUnterneukirchen2,987 people
- 41 kmBurgkirchen an der Alz11,006 people
- 45 kmMehring2,242 people
- 55 kmPerach1,225 people
- 59 kmMarktl2,654 people
- 62 kmStammham1,044 people
- 63 kmHaiming2,516 people
- 63 kmInnat 354 m
Water level along the river (RiverATLAS; the height is exaggerated). Towns: GeoNames and Wikidata; bridges, dams and tributaries: Wikidata.
River in Germany
At the mouth it carries 53 m³/s on average: an Olympic pool every 47 seconds. It drops from 515 m to 354 m, 2.6 m per kilometre on average. Its basin covers 2,197 km², about the size of KM. 1.4 million people live in it. Highest water: from March to May; lowest: from December to February. Its dams hold back little of its water (4.7% of a year's flow).
Where to start
- Trostberg an der AlzLargest city on its banks · 11,676 people
- Salzburg Airport (SZG)Nearest airport with scheduled flights, 42 km from the cityCar hire at SZG airport (Salzburg)Discover Cars · Affiliate link↗
- On the water14 ferry piers, marinas, boat rentals and boat ramps along the river (OpenStreetMap)
- Kayak and canoe21 put-ins and rapids mapped (OpenStreetMap)
- June and from August to SeptemberThe best months to visit
Alz, month by month
Highest water: from March to May
Lowest water: from December to February. Best months to visit: June and from August to September.
From about 150 m³/s in the lowest month to 860 m³/s in the highest. An estimate: the monthly flow is modelled from the lowest and highest months of WaterGAP (RiverATLAS, 1971–2000) and the rain and snow along the river (WorldClim). Dams change the real rhythm. The chip is the average air temperature; below it, the month's rain.
Plan the trip
Plan the trip: boat trips, a bed by the river, a car
Some links above are affiliate links: if you book through them we may earn a commission, at no extra cost to you. It never changes what the data on this page says.
The basin
Alz: the basin in numbers
15,584 km² of land send their water to this river. This is what lives on it.
- 1.4millionpeople live in the basin
- 89/km²people per km²
- 1,444maverage altitude of the basin
- 1,112mmof rain a year (basin average)
- 3.9°Caverage air temperature
- 21%protected areas
- 0.8%covered by lakes
- 1%glaciers
- 7%permafrost
- 0.6km³held in reservoirs
What covers the basin
- 66% Forest
- 5% Cropland
- 32% Pasture
- 5% Towns and cities
- 1% Ice
RiverATLAS (HydroATLAS v1.0, CC BY 4.0): land cover, people, protected areas, glaciers and dams over the whole basin upstream of the mouth.
Along the river
Alz: what you find on the way
- 29WeirsWehr 2 Tacherting, Garchinger Wehr, Walder Wasserfall and 26 more
- 21Canoe put-ins
- 7Boat ramps
- 2Ferry piersSeebruck, Alzfähre
- 2MarinasYachthafen Seebruck
- 1River beachesBadeplatz Laufenau
From OpenStreetMap, within 1.9 km of the river. Not mapped is not the same as not there.
Cross-checked with our atlases
Alz in our other atlases
What our sister atlases know about the waterfalls on this river, the lakes it flows through, the beaches at its mouth, the mountains where it rises and the islands off its mouth.
1waterfall on the riverCascadyas
2lakes on its wayLakeyas
4mountains at the sourcePeakyas
Waterfalls (1)
On the river, by Cascadyas
- Naturwehr in der Alz und Alzhang NW von Altenmarktkm 15
Cascadyas is coming soonOpen Cascadyas ↗
Lakes and reservoirs (2)
Lakes it flows through, by Lakeyas
- Chiemseekm 1 · 72 m deep75km²
- Klosterseekm 50.3km²
Lakeyas is coming soonOpen Lakeyas ↗
Mountains at the source (4)
Within 15 km of the source, by Peakyas
- Rampelsberg8.5 km away555m
- Schlossberg von Tettelham15 km away559m
- Buch-Berg14 km away
- Schei Berg14 km away
From space
The source and the mouth, seen from orbit
Sentinel-2 cloudless 2016 by EOX IT Services GmbH (contains modified Copernicus Sentinel data 2016), CC BY 4.0. The glowing line is the river as drawn by RiverATLAS.
Photos
Alz in pictures
Tributaries
Where it flows, and what flows into it
It flows into
InnGermany517 km740 m³/sTributaries (3)
Also: Traun, Halsbach, Ischler Achen
Romania
Serbia
Croatia
Moldova
AustriaNearby
Rivers nearby
Where these numbers come from
| Name, length, places | Wikidata (Q450584) · CC0 |
|---|---|
| Course, profile, basin | RiverATLAS v1.0 (HydroATLAS, Linke et al. 2019) · CC BY 4.0 — followed from the source to the mouth given by Wikidata |
| Flow | WaterGAP (RiverATLAS), 1971–2000 · CC BY 4.0 |
| Climate along the river | WorldClim (RiverATLAS), 1970–2000 · CC BY 4.0 |
| Towns, bridges, dams | Wikidata · CC0; GeoNames · CC BY 4.0 |
| Along the river | © OpenStreetMap contributors · ODbL |
| Images | EOX Sentinel-2 cloudless 2016 · CC BY 4.0; Wikimedia Commons |
| Our other atlases | Cascadyas, Lakeyas, Peakyas — Wikidata · CC0; © OpenStreetMap contributors · ODbL; GeoNames · CC BY 4.0; HydroLAKES · CC BY 4.0; NOAA OISST |
Every source and licence is on the data sources page.
The family
Do you prefer beaches, lakes, mountains, waterfalls, islands, rivers or canyons?
Same idea, other landscapes: field atlases built on open data, month by month, in seven languages.
beaches
Find your beach: sea temperature, sun and swimming month by month.Visit lakes
Every lake on Earth: water temperature, ice, depth and the shore.Coming soonVisit mountains
Every summit in 3D: summit weather, the 0 °C line, huts and trails.Visit waterfalls
Every waterfall: height, flow month by month and when it roars.Coming soonVisit 
islands
Every island from the sea up: size, sea temperature, ferries and 3D.Coming soonVisit 
rivers
Every river from source to sea: the journey, the flow and the basin in numbers.You are here
canyons
Every canyon cut to scale: depth to the floor, rim and floor temperatures, trails and viewpoints.Coming soonVisit