A mountain flying checkout is training, not a rating: the FAA issues no mountain endorsement and no regulation requires one. What requires it is arithmetic. Van Nuys sits at 802 feet. Big Bear City Airport sits at 6,752 feet with a single 5,850-foot runway and no control tower, and on a hot afternoon its density altitude routinely climbs past 10,000 feet, at which point a light trainer that leapt off runway 16R at home may not climb out of the valley at all.
We run mountain checkouts out of Van Nuys at $110 per hour for instruction plus the aircraft at its published rate. The three destinations that matter for pilots based here are Big Bear, Mammoth and Catalina, and they test three completely different things. For the wider training picture start with learning to fly in Los Angeles, and for the airspace you cross on the way out see our Los Angeles airspace guide.
Density Altitude Is The Whole Subject
Everything else in mountain flying is a consequence of one fact: your engine, your propeller and your wing all care about air density, and air density falls as elevation rises and as temperature rises.
The standard rule of thumb is that density altitude equals pressure altitude plus about 120 feet for every degree Celsius that the temperature is above standard for that pressure altitude, where standard is 15 degrees at sea level falling about 2 degrees per thousand feet. Work an example at Big Bear on a summer afternoon, assuming standard pressure:
- Field elevation 6,752 ft, so standard temperature there is about 1.5 degrees Celsius.
- Actual temperature 30 degrees Celsius, so you are about 28.5 degrees above standard.
- 28.5 multiplied by 120 is about 3,420 feet.
- Density altitude is therefore roughly 10,200 feet.
Do the same sum for Mammoth Yosemite at 7,135 feet on a 25-degree day and you get roughly 10,000 feet. Your normally aspirated engine is now producing a fraction of its sea-level power, your propeller is biting thinner air, your true airspeed for a given indicated airspeed is much higher, your takeoff roll is far longer and your rate of climb may be close to nothing. None of this is dramatic in the moment. That is what makes it dangerous.
The checkout teaches you to do this sum before you leave home, to look up the performance charts for the actual airplane at the actual weight, and to decide on the ground what your no-go numbers are.
The Three Destinations, And What Each One Teaches
| Airport | Elevation | Runway | Tower | Distance From KVNY | What It Tests |
|---|---|---|---|---|---|
| Big Bear City, L35 | 6,752 ft | 8/26, 5,850 x 75 ft | No | About 81 nm east | Density altitude, terrain-bounded pattern |
| Mammoth Yosemite, KMMH | 7,135 ft | 9/27, 7,000 x 100 ft | No | About 206 nm north | High-altitude cruise, Sierra weather, range |
| Catalina, KAVX | 1,602 ft | 4/22, 3,000 x 75 ft | No | About 48 nm south | Short field, open water, plateau approach |
| Van Nuys, KVNY, for reference | 802 ft | 16R/34L 8,001 ft; 16L/34R 4,000 ft | Yes, Class D | Home | — |
Big Bear: The Density Altitude Lesson
Big Bear is the classic first mountain destination from Los Angeles because it is close, it is genuinely high, and it punishes exactly the mistakes a valley-trained pilot makes. The field sits in a bowl surrounded by terrain, so the pattern is not a rectangle drawn wherever you like, and there is no tower to help you. The runway is long enough that a lightly loaded airplane on a cool morning is entirely comfortable; the same airplane at gross weight at three in the afternoon in August is a different proposition.
The lesson is departure planning. Arriving somewhere high is rarely the problem. Leaving is, because you are asking for climb performance in air that will not give it. Our checkout does Big Bear early in the morning, deliberately, and then talks about what the afternoon numbers would have been.
Mammoth: Range, Weather And The Sierra
Mammoth Yosemite is 206 nautical miles north of Van Nuys, on the eastern side of the Sierra Nevada, at 7,135 feet with a 7,000-foot runway. The distance alone makes it a real cross-country: fuel planning, alternates that are a long way apart, and terrain along most of the route.
It also introduces mountain weather properly. Wind flowing over a ridge line produces lift on the upwind side and descending air on the downwind side, and in strong conditions a mountain wave with rotor turbulence beneath it. Light aircraft have been unable to outclimb a lee-side downdraft. The management technique is not heroism, it is route and timing: cross ridges at an angle so you can turn away, cross with height in hand, and fly in the morning before the wind builds.
Altitude also brings 14 CFR 91.211 into play. Above 12,500 feet MSL cabin pressure altitude up to and including 14,000 feet, the required minimum flight crew must use supplemental oxygen for that part of the flight of more than 30 minutes duration. Above 14,000 feet they must use it the whole time. Above 15,000 feet, every occupant must be provided with supplemental oxygen. Crossing the Sierra with terrain clearance can put you in that first band without it feeling like high-altitude flying.
Catalina: The Short Field And The Water
Catalina Airport sits at 1,602 feet on a plateau in the middle of the island, 48 nautical miles south of Van Nuys, with a single 3,000-foot runway and no tower. It is not high, but it teaches two things nothing else in the area does.
The first is short-field discipline. Three thousand feet at 1,602 feet of elevation on a warm day, with terrain falling away, means you fly a precise approach speed and you commit to a go-around early rather than late. The second is the water. Part of the leg is beyond gliding range of a beach, which changes how you think about the engine, about life jackets and about altitude. A higher cruise costs nothing and buys options.
Our separate page on flying to Catalina Island from Van Nuys covers the trip itself in detail.
What The Checkout Covers
Ground first, because most of mountain flying is decided before engine start.
- Density altitude and performance charts for the specific airplane, at the weight you will actually be at, using the airport's real elevation and a realistic temperature.
- Weight and balance as a limiting factor, not a formality. The most common mountain accident setup is four adults, full fuel and a hot afternoon.
- Route planning around terrain, including which passes are usable, where the outs are, and how a lower route can be safer than a direct one.
- Mountain weather: wave, rotor, lee-side sink, valley winds, and the reason morning flying is not merely more comfortable.
- Non-towered operations, because L35, KMMH and KAVX have no tower and self-announcing properly into a terrain-bounded pattern is a skill.
- Oxygen requirements under 91.211 and the practical effects of altitude on you rather than on the airplane.
Then flying: ridge crossings at an angle, canyon turns, the decision to turn back, short-field technique at altitude, and at least one departure from a high field where you calculate the numbers beforehand and then compare them with what the airplane actually did.
Which Of Our Airplanes Is Right For This
Being honest about this is part of the training, so here it is.
| Aircraft | Power | Retail $/hr | Package $/hr | Comment |
|---|---|---|---|---|
| Cessna 162 Skycatcher | 100 hp | $269 | $179 | Fine for Catalina in cool conditions; not the airplane for Big Bear on a summer afternoon |
| Diamond DA20-C1 | 125 hp | $329 | $229 | Two seats keeps the weight sensible; still a normally aspirated light airplane |
| Piper Warrior PA-28-161 | 160 hp | $269 | $179 | Capable with two aboard and a careful weight plan; marginal at four |
| Piper Arrow PA-28R | 200 hp | $349 | $229 | More power and a constant-speed propeller, which helps at altitude |
| Cirrus SR22 Turbo | 310 hp turbocharged | $649 | $449 | The right tool: turbocharging holds power with altitude, certified to FL250 |
Instruction is $110 per hour and ground instruction is $110 per hour. Rates are wet. A realistic Big Bear checkout is a ground session plus a three-hour round trip; Mammoth is a day. We do not currently publish a fixed-price mountain course, so the honest answer to "what does it cost" is instruction plus aircraft at the published rate, and we will give you a total on the phone once we know which airplane and which destination.
Related Reading
- Cross-country destinations from Van Nuys — the wider list, with distances and runway lengths.
- Fly to Catalina Island from Van Nuys — the island trip in detail.
- Flying in Los Angeles airspace — the structure you cross on the way out and back.
- The airplanes you'll fly — power, weight limits and rates for every aircraft.
- Cirrus transition training — if the turbocharged SR22 is the airplane you want for this.
- Flight reviews at Van Nuys — a mountain flight makes an excellent 61.56 review.
Mountain Flying Checkout FAQ
Do I Need An Endorsement To Fly In The Mountains?
No. The FAA issues no mountain flying endorsement and no regulation requires mountain training. Rental operators frequently require a checkout before releasing an aircraft to high-elevation airports, and insurance may too, but that is a business requirement rather than a federal one.
How High Is Big Bear Airport?
Big Bear City Airport, L35, sits at 6,752 feet with a single runway 8/26 of 5,850 by 75 feet and no control tower. It is about 81 nautical miles east of Van Nuys. On a 30-degree Celsius afternoon its density altitude is in the region of 10,200 feet.
What Is Density Altitude In Simple Terms?
The altitude your airplane thinks it is at, once temperature and pressure are taken into account. A useful rule of thumb is pressure altitude plus about 120 feet for every degree Celsius above the standard temperature for that altitude. High and hot means less power, a longer takeoff roll and a worse climb.
Can I Fly A Cessna 162 To Big Bear?
On a cool morning at light weight, with the performance charts worked and a plan for the departure, it is flyable. On a hot afternoon at gross weight it is not a sensible idea in a 100-horsepower airplane. That judgment, rather than a yes or no, is what the checkout exists to teach.
When Do I Need Oxygen?
Under 14 CFR 91.211, above 12,500 feet MSL cabin pressure altitude up to and including 14,000 feet the required minimum flight crew must use supplemental oxygen for any part of the flight at those altitudes lasting more than 30 minutes; above 14,000 feet they must use it throughout; above 15,000 feet every occupant must be provided with it.
How Long Does A Mountain Checkout Take?
A ground session plus a round trip to Big Bear is the usual shape, so most of a morning. Mammoth is a full day because of the distance. Some pilots do both over two sessions, which is the version we would recommend if you intend to fly the Sierra regularly.
What Does A Mountain Checkout Cost At Van Nuys?
Instruction is $110 per hour and ground instruction is $110 per hour, plus the aircraft at its published wet rate, from $269 per hour retail for a Warrior or Skycatcher up to $649 for the Cirrus SR22 Turbo. We do not currently publish a fixed-price mountain package, so call (818) 330-1318 for a total.
Is Catalina A Mountain Airport?
Not in elevation terms at 1,602 feet, but its 3,000-foot runway on a plateau with terrain falling away teaches short-field discipline, and the over-water leg beyond gliding range of a beach teaches altitude planning. It is the natural first trip before Big Bear.
Book Your Mountain Checkout
Tell us which destination you have in mind and which airplane you want to fly it in, and we will build the session around your numbers rather than a generic syllabus. Call (818) 330-1318, open 9:00 AM to 9:00 PM every day, or book a free consultation. We are at 7900 Balboa Blvd, Van Nuys, CA 91406, on Van Nuys Airport. If you have never flown a light aircraft at all, start with a discovery flight at $229 for 60 minutes, credited in full toward training if you enroll within 24 hours.