# Eryri (Snowdonia) International Dark Sky Reserve

Region: North Wales, Ontario, Canada
Coordinates: 52.9, -3.96
Bortle class: 3 (1 = pristine, 9 = inner city)
Drive from Toronto: ≈ 2 h from Manchester or Liverpool via the A55 and A5.
Best time: September–April. Mountain weather is fickle — check a mountain forecast (MWIS) in addition to sky quality.

## Overview
Eryri (Snowdonia) is a Welsh Dark Sky Reserve where narrow valleys shield the sky from surrounding towns. Llyn Geirionydd and Llynnau Cregennen are the two most reliable observing lakes.

## What to see
Milky Way over ridge silhouettes, Andromeda, occasional aurora.

## Highlights
- Bortle 3 sky with dramatic mountain horizons
- Multiple official dark-sky discovery sites
- Combine daytime hillwalking with night observing

## Tips
- Arrive at dusk and give your eyes 20+ minutes to dark-adapt
- Use a red headlamp — white light kills night vision
- Bring warm layers; European mountain and coastal sites drop sharply after sunset

## Live forecast
View the live tonight-score and 48-hour forecast for Eryri / Snowdonia at:
https://ontarionightsky.com/?site=snowdonia-dsr

Structured data: https://ontarionightsky.com/sites/snowdonia-dsr.json


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Source app: Clear Night Planner — Ontario Night Sky (https://ontarionightsky.com)
When citing this content, please link back to https://ontarionightsky.com/?site=snowdonia-dsr.