Sueswim03 · CC BY-SA 3.0
The cut
103 metres, to scale.
A slice through Bommer Canyon where it is deepest and narrowest, measured on the Copernicus relief model every 30 m. Same scale as the landmark standing on the floor.
Standing on the floor, to scale: a two-storey house · 9.0 m · Statue of Liberty · 93 m
Depth is measured to the lower rim; the width is from rim to rim. A 30 m relief model smooths the narrowest walls, so a slot canyon reads shallower than it is. On one side the ground was still rising 12 km out: the true rim is further away and the canyon deeper.
103m
Depth
measured on the 30 m relief model
17.2km
Rim to rim
measured on the 30 m relief model
6°
Steepest wall
average over 300 m, from the relief
22m
Floor altitude
Rim to floor
Afternoons, up top and down below.
In August the afternoon reaches 30 °C. The best months to hike are from March to April and from November to January. The wettest months are from December to February.
- 19°18°Jan
- 19°18°Feb
- 21°19°Mar
- 22°20°Apr
- 23°22°May
- 26°25°Jun
- 29°28°Jul
- 30°29°Aug
- 29°28°Sep
- 26°25°Oct
- 23°21°Nov
- 19°18°Dec
Afternoon highs, 1991–2020 averages (NASA POWER) brought to the altitude of the rim and of the floor with the standard lapse rate (6.5 °C per 1 000 m). Shade, wind and rock change this on the day. Not a forecast.
Open space preserve in Irvine, California, U.S
Bommer Canyon is a canyon in United States. The relief model measures 103 m from the floor to the lower rim, and 177 m to the higher one. Rim to rim it is 17 km wide where the cut was taken.
Getting there.
- Turtle Rocknearest town · 1.5 km in a straight line
- Parking 540 m awaynearest car park in OpenStreetMap, straight line
- Viewpointsnearest viewpoint · 0.8 km from the floor
- John Wayne Orange County International Airport (SNA)nearest airport with scheduled flights · 8 km in a straight lineCar hire at SNA airport (Santa Ana)Discover Cars · sponsored link↗
- From March to April and from November to Januarybest months to hike (estimate)
Plan the visit
Guided hikes, a bed nearby, 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.
From the sky.
The canyon from above, with the relief shaded, the line of the cut, the river and what people have mapped around it.
N
6 km
Sentinel-2 cloudless 2016 (EOX, CC BY 4.0), 24 × 24 km, north up. The line is the cut above. Points © OpenStreetMap contributors.
Around the canyon.
- 10viewpoints within 5 kmSerrano Ridge Viewpoint, Parker Vista, Sunset Point and 7 more
- 1marked hiking routes within 4 kmCalifornia Mission Trail - stage 03 San Juan Capistrano to Mission San Gabriel A
- 38footbridges and suspension bridges within 3 kmWatson Bridge, Quail Trail, Shady Oaks Trail and 35 more
- 181car parks within 3 km
- 31information boards and visitor centres within 4 km
- 10bus stops within 2 km
- 4campsites within 8 kmDeer Canyon Campground, Upper Moro Campground, Lower Moro Campground and 1 more
- 46hotels and guesthouses within 8 kmAyres Hotel Laguna Woods, Hyatt Regency, La Quinta Inn & Suites and 43 more
- 54restaurants and cafés within 4 km
- via ferrata routes within 4 km
- climbing crags within 3 km
- rafting, canoe, kayak or canyoning spots within 4 km
- swimming spots within 3 km
- named waterfalls within 4 km
- caves within 3 km
Counted in OpenStreetMap, the map anyone can edit, around the floor of the canyon. A low number may just mean nobody has mapped it yet. © OpenStreetMap contributors (ODbL).
Towns nearby
- Turtle Rock1.5 km in a straight line
- San Joaquin Hills3.3 km in a straight line
- UC Irvine3.3 km in a straight line
- University Town Center3.4 km in a straight line
- University Park3.7 km in a straight line
- Quail Hill3.8 km in a straight line
- Irvine4.6 km in a straight line
- Irvine Health and Science Complex5.1 km in a straight line
In our other atlases
What else is around Bommer Canyon.
The river that carved it, the waterfalls inside it, the mountains on the rim, the lakes, beaches and island nearby — from our six sister atlases, each with its own figures.
Figures from the sister sites' databases (Wikidata, HydroATLAS, GeoNames, NOAA, OpenStreetMap). Links open when each site is online.
Month by month
The weather, at the floor and at the rim.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Afternoon · floor | 19 | 19 | 21 | 22 | 23 | 26 | 29 | 30 | 29 | 26 | 23 | 19 |
| Afternoon · rim | 18 | 18 | 19 | 20 | 22 | 25 | 28 | 29 | 28 | 25 | 21 | 18 |
| Night · rim | 9 | 9 | 10 | 11 | 13 | 15 | 18 | 18 | 18 | 15 | 12 | 9 |
| Rain (mm) | 57 | 68 | 32 | 20 | 8 | 1 | 4 | 3 | 4 | 16 | 26 | 60 |
| Rainy days | 7 | 8 | 6 | 3 | 2 | 0 | 1 | 1 | 1 | 2 | 4 | 6 |
| Sun hours/day | 7.1 | 7.8 | 9.0 | 10.1 | 10.3 | 11.0 | 11.4 | 11.4 | 10.2 | 8.6 | 7.7 | 6.7 |
| Afternoon · floor | Afternoon · rim | Night · rim | Rain (mm) | Sun hours/day | |
|---|---|---|---|---|---|
| Jan | 19 | 18 | 9 | 57 | 7.1 |
| Feb | 19 | 18 | 9 | 68 | 7.8 |
| Mar | 21 | 19 | 10 | 32 | 9.0 |
| Apr | 22 | 20 | 11 | 20 | 10.1 |
| May | 23 | 22 | 13 | 8 | 10.3 |
| Jun | 26 | 25 | 15 | 1 | 11.0 |
| Jul | 29 | 28 | 18 | 4 | 11.4 |
| Aug | 30 | 29 | 18 | 3 | 11.4 |
| Sep | 29 | 28 | 18 | 4 | 10.2 |
| Oct | 26 | 25 | 15 | 16 | 8.6 |
| Nov | 23 | 21 | 12 | 26 | 7.7 |
| Dec | 19 | 18 | 9 | 60 | 6.7 |
Averages 1991–2020 (NASA POWER) for a cell about 55 km wide, brought to the floor (22 m) and the rim (199 m) with the standard lapse rate. Not a forecast.
Photographs
Seen from the trail.

Recent years
Wet years, dry years.
Rain of each month as a share of the 1991–2020 average. A dry year means a lower river and hotter rock; a wet one, more water in the gorge.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2020 | 14% | 17% | 330% | 485% | 24% | — | — | — | — | 5% | 45% | 47% |
| 2021 | 80% | 3% | 116% | 12% | 15% | — | — | — | — | 121% | 0% | 228% |
| 2022 | 5% | 15% | 104% | 29% | 4% | — | — | — | — | 62% | 188% | 106% |
| 2023 | 287% | 119% | 523% | 11% | 171% | — | — | — | — | 7% | 78% | 57% |
| 2024 | 100% | 301% | 274% | 70% | 40% | — | — | — | — | 4% | 12% | 2% |
| 2025 | 25% | 97% | 209% | 27% | 79% | — | — | — | — | 117% | 369% | 108% |
130% or more: wet month 70% or less: dry month
Compare with the neighbours.
Where these figures come from
| Name, type, published depth and length | Wikidata (Q4940886) · CC0 |
|---|---|
| The cut: depth, width, wall and 3D model | Copernicus DEM GLO-30 · © DLR e.V., © Airbus Defence and Space GmbH, Copernicus/ESA |
| Climate | NASA POWER, 1991–2020 |
| Viewpoints, trails, bridges and the river line | © OpenStreetMap contributors · ODbL |
| Images | EOX Sentinel-2 cloudless 2016 · CC BY 4.0; Wikimedia Commons |
| Rivers, waterfalls, mountains, lakes, beaches and islands nearby | Coastya, Lakeyas, Peakyas, Cascadyas, Islandyas, Riveryas |
Every figure is an average, an estimate or a count from a public dataset. Licences and methods: data sources.
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.



