FIELD
ZONE // CHAMONIX–ZERMATT ·WINDOW 04:20 OPEN ·FREEZING LVL 3,400m ·UIAGM TEAM 12 ·CREVASSE HAZARD MODERATE ·WIND NW 18 km/h ·VISIBILITY 14 km ·SOLAR +04:51 / −20:02 ·ZONE // CHAMONIX–ZERMATT ·WINDOW 04:20 OPEN ·FREEZING LVL 3,400m ·UIAGM TEAM 12 ·CREVASSE HAZARD MODERATE ·WIND NW 18 km/h ·VISIBILITY 14 km ·SOLAR +04:51 / −20:02 ·ZONE // CHAMONIX–ZERMATT ·WINDOW 04:20 OPEN ·FREEZING LVL 3,400m ·UIAGM TEAM 12 ·CREVASSE HAZARD MODERATE ·WIND NW 18 km/h ·VISIBILITY 14 km ·SOLAR +04:51 / −20:02 ·ZONE // CHAMONIX–ZERMATT ·WINDOW 04:20 OPEN ·FREEZING LVL 3,400m ·UIAGM TEAM 12 ·CREVASSE HAZARD MODERATE ·WIND NW 18 km/h ·VISIBILITY 14 km ·SOLAR +04:51 / −20:02 ·
4,810 m02 km
LAT
44°N
LON
06°E
ELEV
4,810m
IFMGA / UIAGM · Martigny · CH

SUM·MIT

We guide the line between ambition and humility. A cooperative of twelve IFMGA-certified mountain guides running technical ascents, ski traverses and ice routes across the Western Alps since 2011.

TRANSECT · CHAMONIX → ZERMATT · 180km
Chamonix1,035mArgentière1,252mCab. Trient3,170mCol du Chardonnet3,323mVerbier1,500mCab. Dix2,928mArolla2,006mCol de Valpelline3,562mZermatt1,620m
FIELD CARD 04/04
Mont Blanc
GOÛTER · NORMAL ROUTE · AD
Freezing
3,400m
Wind NW
18 km/h
Snowpack
Stable
Crevasse
MOD
WINDOW04:20 → 09:40
▲ 4,810m
UIAGM · 12
Full-certified guides in-cooperative. No subcontractors.
§ 01 · Manifesto

Why we
move slowly.

Routes reviewed / yr412
Guides active12
Client / guide ratio2.1 : 1
Average acclim+48h

The mountain is not an adversary and it is not a stage. It is a system with weather, rock, ice, time and bodies, and the guide's work is to read the system — then to refuse, reshape, or accept its offer. We sell the refusal as much as the acceptance.

Every route in this catalog has been repeated dozens of times by our guides under every imaginable condition. Our slow pace is a technical choice: 48 hours more acclimatization, one extra hut night, a rest afternoon before summit day. The numbers show what slowness buys — an incident rate at 0.04% versus an industry average of 0.31%, and a summit rate 18 points higher than the valley average despite climbing the same objectives.

We are organized as a worker-owned cooperative, not an agency. There is no sales team. The same guide who plans your route climbs it with you and writes the debrief. Decisions are made through a weekly board, and the full schedule — including cancelled objectives and why — is archived and available to every client in their after-action file.

SIGNEDRuedi Lanter · secretary of the board· 12.11.2011 — Martigny, Valais
§ 02 · Route catalog

Six routes.
One season book.

Sorted by commitment, not by price. Each line is a complete field file — grade, altitude, rope team, acclimatization days, and the bailout protocol. The catalog is frozen at the start of each season and re-issued in August.

  • R-01
    Mont Blanc
    Goûter ridge · normal route
    Goûter ridge · normal route
    AD
    4,810m
    2 days
    1 guide · 2 clients
    ACCLIM 3 days
  • R-02
    Eiger · Mittellegi
    East ridge · Bernese Oberland
    East ridge · Bernese Oberland
    D+
    3,970m
    2 days
    1 guide · 1 client
    ACCLIM 2 days
  • R-03
    Haute Route
    Chamonix → Zermatt · ski traverse
    Chamonix → Zermatt · ski traverse
    PD
    3,789m (col)
    6 days
    1 guide · 4 clients
    ACCLIM 1 day
  • R-04
    Matterhorn
    Hörnli ridge · Swiss side
    Hörnli ridge · Swiss side
    AD+
    4,478m
    1 day
    1 guide · 1 client
    ACCLIM 3 days
  • R-05
    Dent du Géant
    SW face · fixed-rope pitches
    SW face · fixed-rope pitches
    D
    4,013m
    1 day
    1 guide · 2 clients
    ACCLIM 2 days
  • R-06
    Technical Ice Intro
    Cogne icefalls · waterfall ice
    Cogne icefalls · waterfall ice
    WI3
    1,850m base
    2 days
    1 guide · 2 clients
    ACCLIM
6 objectives · season 26/27 · revised 08.2026Request a route not listed: routes@summit.coop
§ 03 · Grades legend

The six letters every roped climber must read.

The IFAS alpine system grades the overall seriousness of a route, combining rock, ice, exposure and commitment. Summit publishes every client's pre-climb grade expectation in writing.

F
01 / 06
Facile
Easy

Snow slopes below 35°. Few objective hazards. Glacier travel with rope.

PD
02 / 06
Peu Difficile
Slightly difficult

Steeper snow, short ice sections, moderate rock up to III. Crevasse risk.

AD
03 / 06
Assez Difficile
Fairly difficult

Sustained ice/snow above 45°, rock III–IV, committing ridge traverses.

D
04 / 06
Difficile
Difficult

Sustained technical rock IV–V, steep ice WI3, long exposure, serac threat.

TD
05 / 06
Très Difficile
Very difficult

Technical rock V+, mixed M4, sustained exposure, serious bail decisions.

ED
06 / 06
Extrêmement Difficile
Extremely difficult

The Grandes Jorasses north face territory. Reserved. Not a client route.

§ 04 · Guide roster

Four of twelve.
The rotation you meet.

Every guide is UIAGM/IFMGA-certified. Ownership of the cooperative is distributed equally. Below: the four senior guides most likely to hold your rope on a western-Alps file.

01 / 12
IFMGA · UIAGM 2009
Ruedi Lanter
Grindelwald, CH
Signature first ascent

First winter repeat · Eiger Mittellegi-Lauper link · 2018

17 yrs active
02 / 12
IFMGA · UIAGM 2013
Camille Ferrand
Chamonix, FR
Signature first ascent

First female solo · Innominata integral · 2021

13 yrs active
03 / 12
IFMGA · UIAGM 2011
Tenzin Dorje
Zermatt, CH (Khumbu, NP)
Signature first ascent

New line · Nuptse SE buttress · 2017 (M6 WI4)

15 yrs active
04 / 12
IFMGA · UIAGM 2015
Ines Kovač
Kranjska Gora, SI
Signature first ascent

Winter traverse · Julian Alps crown · 7-day alpine-style

11 yrs active
§ 05 · Gear manifest

Eight items.
Eighty per cent of the work.

A cross-referenced pre-climb checklist. Every client receives this as a PDF with supplier links, sizing, and a rental option for any item. Items carried by the guide are marked as such.

Thermometer
Compass
Snowflake
Pentagon
  • 01
    Harness
    Petzl Sama · adjustable legs
    360g
    Client-owned or rental
  • 02
    Helmet
    Petzl Sirocco · EN 12492
    170g
    Required above 3,000m
  • 03
    Crampons
    G-22 Plus · horizontal 12-point
    960g / pair
    Semi-auto · C2 rated boots
  • 04
    Ice axe
    60cm · CEN-B rated
    445g
    Single walking axe · dolomitic shaft
  • 05
    Double ropes
    2 × 60m · 8.5mm dry-treated
    3.1kg / pair
    Carried by guide
  • 06
    Bivy setup
    1.1kg bag · 30g ground sheet
    1.13kg
    Emergency only · guide carries
  • 07
    Insulation
    850-fill hydrophobic down
    380g
    Below-freezing hut approach
  • 08
    Screwgate biners
    HMS wide-gate · 4 per client
    76g ea.
    Belay & rescue configuration
Total pack weight (client) · 6.4 kg dry · 7.8 kg wetDownload manifest PDF
§ 06 · Schedule

7-day acclim
for a 4,810m objective.

A model week for a Mont Blanc expedition. Altitude, task, and physiological load are pre-computed; guides adjust in 4-hour blocks based on morning oximetry.

D-01
01/07
1,035m (Chamonix)

Medical intake · gear audit · rope team assignment

EFFORTREST
D-02
02/07
2,317m (Plan de l'Aiguille)

Crampon technique · short-rope protocol · crevasse rescue drill

EFFORTMODERATE
D-03
03/07
3,613m (Aiguille du Midi)

Altitude exposure · arête traverse · fixed-rope practice

EFFORTLIGHT
D-04
04/07
3,167m (Cosmiques hut)

Approach · early dinner · 02:30 alarm

EFFORTLOW
D-05
05/07
4,248m (summit push A)

Glacier roped travel · mixed pitch · descent to hut

EFFORTHEAVY
D-06
06/07
3,817m (Goûter hut)

Rest morning · gear dry-out · weather re-assessment

EFFORTREST
D-07
07/07
4,810m (Summit)

Pre-dawn departure · summit window · descent to valley

EFFORTCRUX
ALTITUDE PROFILE · METRES
1,035 → 4,810
0m1000m2000m3000m4000m5000mFREEZING LVL · 3,400mD-01D-02D-03D-04D-05D-06D-074,810m
§ 07 · Field manual

Five rules.
No exceptions.

The field manual is re-ratified every January at the cooperative assembly. A single vote of the twelve guides can add, remove or rewrite a rule. This is the 2026 edition.

v.14.2 · amended 12.2025 · Martigny
01

The mountain writes the schedule.

Weather, freeze level and snowpack set the turnaround. Your schedule does not.

02

Turn around is not failure.

Eighty percent of incidents happen on descent. A bailed summit is a completed climb.

03

Cooperative, not hierarchy.

Guides share decisions through a daily board. No single person owns a route call.

04

The slow way is the fast way.

We acclimatize 48h longer than competitors. Our summit rate is 18 points higher.

05

Leave the line better.

We clean a pitch every rotation. Old tat, fixed slings, and forgotten gear come home with us.

§ 08 · The ledger

Numbers we publish.
Numbers we answer for.

YEAR-TO-DATE · 2026
Summits
3,814
Cooperative-wide · since 2011
Client success rate
87.2%
Weather-window adjusted
Incident rate
0.04%
Industry avg 0.31%
Longest ascent
19h 42m
Eiger NF · client-led 2023
§ 09 · Enquiries

Before
you tie in.

The questions we answer most often, in writing so we can match the wording each time. If yours is missing, write directly to the secretary of the board.

  • For PD and below, a week of basic mountaineering and reasonable aerobic fitness is sufficient — we will refine rope and crampon technique in a dedicated D-02 skills day. For AD and above we require documented prior ascents at the grade below and a video submission of your ice and rock technique. Not gatekeeping; it is our obligation under the cooperative's risk protocol.

§ 10 · Enquire

Open a file.
Start a season.

Tell us the objective, the window, and any documented prior ascents. A guide from the relevant region replies within 48 hours with either an open slot, a proposed alternative, or a candid no.

Office
Rue du Rhône 18
1920 Martigny, VS
Dispatch
+41 27 555 11 40
board@summit.coop

Reply within 48h · from the guide, not a sales desk.