Lookout, Signal and your tires: what the elevations actually say

Chattanooga is sold on its mountains and a lot of car advice written about it takes the scenery at face value. This page does the opposite: it uses only elevations we can point at, and it is deliberately short on the things nobody has measured.

The numbers, and where they came from

Single-point elevation queries against the USGS elevation service, each at a named coordinate, at one-metre resolution, all read 2026-09-20:

Place	Elevation
Point Park, Lookout Mountain	2,037.0 ft
Signal Point, Signal Mountain	1,801.1 ft
Crest Road, Missionary Ridge, at the Sherman Reservation	750.0 ft
Market Street at 8th, downtown	676.5 ft
Tennessee River bank at Ross's Landing	677.0 ft
Chattanooga Lovell Field	669.8 ft
Frazier Avenue, North Shore	651.7 ft

From those: downtown to Point Park is a rise of 1,360.5 feet (DERIVED: 2,037.0 minus 676.5). Downtown to Signal Point is 1,124.6 feet (DERIVED: 1,801.1 minus 676.5).

And the correction most Chattanooga car advice needs: Missionary Ridge stands 73.5 feet above downtown at the point we sampled (DERIVED: 750.0 minus 676.5). The ridge that runs behind the eastern neighbourhoods is a low ridge. Lookout and Signal are the mountains. If somebody tells you that living near the ridge is hard on brakes and tires the way the mountain roads are, they have not looked at the numbers.

One limit on all of it. These are point elevations at coordinates we chose. They are not summit heights, they are not neighbourhood averages, and two of them cannot be divided into a gradient without a road profile, which we do not have. Nothing on this page converts a pair of elevations into a percent grade, and you should be suspicious of anything that does.

We also do not publish a slope figure for any Chattanooga neighbourhood, because none exists. The attempt to cut the county's own slope layer down to neighbourhood boundaries overcounts grossly — it returns more steep acreage inside the Lookout Mountain ZIP area than that area contains land. The terrain page sets out what the county-level slope data does and does not support.

What a long climb and a long descent ask of a tire

None of this is Chattanooga-specific physics, and we are not going to dress it up as though it were. It is simply the ordinary maintenance case, made less forgiving by 1,360 feet of vertical.

• Pressure, set to the door placard, cold. Not the number moulded into the sidewall, which is a maximum rather than a recommendation. Where the placard is and how to read it covers it.
• Tread depth, measured rather than eyeballed. Descending grades in wet weather is where shallow tread stops being theoretical, and Chattanooga's 1991-2020 normals give 52.48 inches of precipitation a year across 119.6 days with measurable rain, 36.5 of them with half an inch or more.
• Age, from the DOT date code. A tire can have tread and still be old. We read the code at every visit.
• All four matching, particularly on all-wheel drive. Mixing tire brands and how many tires to replace cover why one odd tire can be a drivetrain problem rather than a tire problem.

We have no Chattanooga-specific figure for how many cars here are all-wheel drive, and we are not going to imply one from the hills. What we can say is that Tire Rack's own default configuration for this market is an all-wheel-drive vehicle, which tells you about its directory rather than about the city.

The ice question, answered with the actual amounts

The mountains attract a lot of talk about winter traction. The measured position at Chattanooga Lovell Field, 1991-2020 normals:

• Annual snowfall 3.9 inches.
• 2.7 days a year with an inch or more of snow, 1.0 day with three inches or more, 0.5 days with five inches or more.
• Monthly snow normals: January 1.7, February 0.6, March 1.2, April 0.1, December 0.3 inches, with November unreported.
• 58.3 nights a year with a minimum below 32F, but only 2.6 days with a maximum below 32F.

That last pair is the shape of the whole winter here: it freezes overnight and thaws by lunchtime, far more often than it stays frozen. The airport is in the valley, and a station reading is a station reading rather than a forecast for a mountain road 1,300 feet higher — but it is the measured record for this city and it is the only one we have.

For the rare big days, from the complete daily record at that station: the largest snowfalls are 18.5 inches on 13 March 1993, 10.2 inches on 7 January 1988, 8.7 inches on 13 February 1960, and 8.4 inches on both 10 January 2011 and 29 January 1966. Days with an inch or more have become rare: 2010 had three, 2011 two, 2014 three, and 2015, 2020, 2024 and 2025 one each, while 2012, 2013, 2016 through 2019, 2021 through 2023 and 2026 to 17 September had none at all.

What the law allows you to do about it, and where that stops

Tennessee gives you a dated window. T.C.A. 55-9-106(b) permits a tire "that has imbedded in it wire or other material for improving traction on snow and ice during the period of October 1 through April 15 of each year", with the wire in contact with the road capped at twenty percent of the contact area during the first 1,000 miles and five percent after that, and the allowance barred entirely on a vehicle over 9,000 pounds gross weight unless it is a school bus or an emergency vehicle.

Subsection (c) separately permits "tire chains of reasonable proportions on any vehicle when required for safety because of snow, ice, or other condition tending to cause a vehicle to skid."

Take that as a legal fact rather than a shopping recommendation. Against 3.9 inches of snow a year across 2.7 days of an inch or more, almost nobody in Chattanooga runs studs, and we are not going to pretend the statutory window is a selling season.

Drive down the mountain into Georgia and the studded-tire position changes and is genuinely contested: a 1968 Attorney General opinion printed against O.C.G.A. 40-8-74 says a studded tire "is a metal tire within the meaning of O.C.G.A. 40-8-74 and may not be used on vehicles operated in this state", while the code's own subsection (c)(2) permits safety metal spike studs when conditions might cause a vehicle to skid. We state both and pick neither. The full Tennessee-Georgia comparison is here, including the tread rule that does change at the line.

Living up there changes the job, and that is measurable

A few things about the mountain communities are measured, and they are the sort of thing that decides whether a mobile fitter is useful to you.

Signal Mountain town: 8,860 people, 89.5 percent of housing units one-unit detached, 26.1 percent of workers at home, and a mean commute of 27.5 minutes — the mountain tax, paid daily.

Lookout Mountain town: 2,111 people, 94.5 percent owner-occupied, and 30.5 percent of households keeping three or more vehicles.

St Elmo and the foot of Lookout (37409): the longest mean commute of the fourteen Chattanooga ZIP Code Tabulation Areas in our research, 27.2 minutes, and the highest two-car share of those fourteen at 58.9 percent of households. Its Census internal point lands at 1,172 feet, which is on the mountain rather than on the valley streets — a good reminder that one point is not a neighbourhood.

Lookout Valley and Tiftonia (37419): 82.5 percent one-unit-detached housing and an 81.0 percent drive-alone share, both the highest of those same fourteen ZCTAs, with an internal point at 1,018 feet.

North Chattanooga and the Signal Mountain flank (37405): the largest of the fourteen at 54.33 square miles, with an internal point at 1,214 feet, 518 feet above the downtown ZCTA's own internal point of 696 feet (DERIVED: 1,214 minus 696, both USGS reads on 2026-09-20; note these are the Census internal points for 37405 and 37402, a different pair of coordinates from the named places in the table above).

Ranking population for every "highest" and "longest" above: the fourteen ZCTAs profiled in our Chattanooga research file, and no others.

Whether we can actually work where you live

This is where the mountain gets practical. We need level, paved, legal ground with room to work at one corner of the car. The industry version of the same requirement, published by Tire Rack: "a flat, paved surface with 6 feet of clearance around your vehicle... A minimum of 10 feet of vertical clearance is also required."

A mountain-top driveway is often perfectly fine — it is the shelf that the house sits on, not the road that gets you there. A driveway cut into a slope halfway up may not be. Tell us what the space looks like when you book, and if we arrive and it is not safe to work in, that visit is not charged. Steep driveways and tight spaces is the page for the details, including the one figure we will not invent.

Our price: $145 for the first tire

A mobile puncture repair on one tire is $145, and $50 for each additional tire in the same visit, with no separate call-out fee. If the tire cannot be repaired, the inspection is charged and the repair is not.

For a replacement we supply the tires and fit them at your address in the same visit; we do not mount tires bought elsewhere, and we do not sell used tires. Wheels up to 22 inches, one to four tires per visit, TPMS reset included where the vehicle supports it at the roadside.

If you keep a second set of wheels for the cold months, seasonal changeover is $350 for a set already on its own wheels and $390 for loose tires that have to be mounted on the same wheels and balanced. We are not storing the off-season set in Chattanooga; it stays with you. Storage is resold through a local partner at $150 a set for a six-month season, and a metro opens only once that partner has an indoor building we have seen, a written rate, insurance covering customer property in their care and a seven-day retrieval commitment. None here has.

Where to go next

Steep driveways in Chattanooga, pothole damage, Tennessee against Georgia, mobile tire repair, what it costs and our Chattanooga service area.

Nationally: all-season against all-weather against winter tires, when to replace your tires, tire pressure and the placard, seasonal changeover, alignment after new tires and the national tread law page.

Questions people ask

• How high is Lookout Mountain above Chattanooga? Point Park reads 2,037.0 feet against 676.5 feet at Market Street and 8th downtown, a rise of 1,360.5 feet. Signal Point reads 1,801.1 feet, a rise of 1,124.6 feet. All are single USGS point reads on 2026-09-20, not summit elevations.
• Is Missionary Ridge a mountain road? Not on these numbers. At the Sherman Reservation on Crest Road it reads 750.0 feet, which is 73.5 feet above downtown.
• How steep are the roads up there? We do not know, and nor does anyone publishing a figure. A gradient needs a road profile, and two point elevations cannot be divided into one.
• Do I need winter tires in Chattanooga? That is your call and it depends where you live and what you drive. The measured position is 3.9 inches of snow a year at Lovell Field across 2.7 days with an inch or more, and 58.3 nights below freezing against only 2.6 days that stay below freezing.
• Are studs legal? In Tennessee, between 1 October and 15 April under 55-9-106(b), with contact-area limits and a 9,000 lb gross-weight ceiling. In Georgia the position is contested between a 1968 Attorney General opinion and the code's own subsection (c)(2), and we state both rather than pick one.
• Can you come up the mountain? Usually, if there is level, paved, legal ground with room at one corner of the car. Describe the space when you book. If we arrive and cannot work safely, the visit is not charged.