Elk reference · Antlers
An inch a day at peak — the fastest-growing bone of any mammal, built and discarded every single year. The full cycle from velvet to shed, what antler points really say about age, how Boone & Crockett scoring works, and when to walk the spring slopes for sheds.
The headline fact
Antler is the fastest-growing bone tissue in any mammal. A mature bull adds 40 pounds of branching bone in a single summer, growing as much as an inch a day in June and July — fast enough that the bull pulls calcium and phosphorus straight out of its own skeleton to keep up. Then, every winter, the whole apparatus is dropped on the ground and the bull starts over.
That annual grow-and-discard cycle is what separates antlers from horns. Horns — on bighorn sheep, bison, pronghorn — are permanent and grow continuously through life. Antlers are temporary, regrown from scratch every year, and unique to the deer family.
The annual cycle
April – May
Growth begins
Bulls shed last year's antlers in late winter, then begin growing a new set from the pedicle on the skull. The new antler is living tissue, soft and blood-rich, sheathed in velvet — a furred skin laced with blood vessels that feeds the growth.
June – July
Peak growth
Antler now grows astonishingly fast — up to an inch a day on a mature bull, the fastest-growing bone tissue of any mammal. The bull's body pulls calcium and minerals from its own skeleton to feed the rack, which is why summer nutrition shows up directly in antler size.
Late August
Velvet shed
The antler mineralizes into hard bone and the blood supply cuts off. The velvet dies and the bull rubs it off against trees and brush over a day or two, revealing the polished hard antler. Stained dark from sap and bark; ready for the rut.
September – October
The rut
Hard antlers are weapons and status symbols. Bulls spar, push, and intimidate; the rack advertises age, health, and dominance. Most antler damage happens here — broken tines and beams from fighting.
November – February
Carrying + drop
Bulls carry the hardened rack through the post-rut and into winter, then drop both antlers — often within hours or days of each other — anywhere from January to early April depending on age, latitude, and body condition. Then the cycle restarts.
Points, names, and scores
Hunters count points per antler. A 6x6— six tines on each side — is a “royal” bull, the classic mature Rocky Mountain rack. A 7x7is an “imperial,” an 8x8a “monarch.” Each tine on a typical bull carries a name in order up the beam: brow, bez, trez, royal, and the forks at the top.
Points are not a clean age count. A healthy bull usually reaches 6x6 by four or five years old; after that, age shows up as mass, beam length, and spread rather than more tines. The reliable way to age a bull is tooth wear, not antler points.
The Boone & Crockett score adds both beams, all the points, and circumference measurements between points, then subtracts the left-right asymmetry. A typical Rocky Mountain bull reaches the record book near 360 inches; 380-plus is exceptional. Roosevelt elk are scored on their own separate scale because of their different antler architecture.
Shed hunting
Bulls drop both antlers from January into early April, usually within a few days of each other. As the snow recedes, shed hunters walk south-facing slopes, bedding areas, and travel corridors looking for the dropped “brown gold.” A matched pair from a big bull is the prize.
Many western states regulate the season to protect wintering wildlife. Colorado, for example, closes public-land shed collection west of I-25 until May 1 each year — wintering elk are at their most stressed and energy-poor, and a shed hunter pushing them off a south-facing slope in March can cost an animal more than the antler is worth.
Always check the current regulations for the state and unit before you go. The rules change, and they exist for a reason.
Frequently asked
A mature bull elk grows antler at up to one inch per day during peak growth in June and July — the fastest-growing bone tissue of any mammal. A full rack can add 40+ pounds of bone in a single summer. The bull mobilizes calcium and phosphorus from its own skeleton to fuel that growth, which is why summer nutrition directly determines antler size.
Yes. Bull elk grow a complete new set of antlers every year and drop them every year. Antlers are shed in late winter (January to early April depending on age and region), and a new set begins growing within weeks. This makes antlers fundamentally different from horns — horns (on sheep, bison, pronghorn) are permanent and grow continuously; antlers are grown and discarded annually.
Antler points are not a reliable age count past the first couple of years. A healthy bull commonly reaches a 6-point (6x6) configuration by 4–5 years old; after that, age shows in mass, beam length, and overall size rather than point count. A '5x5' or '6x6' describes the rack's symmetry, not the animal's years. True aging is done by tooth wear, not antlers.
Hunters describe elk racks by points per side. A 6x6 bull (six tines on each antler) is called a 'royal'; a 7x7 is an 'imperial'; an 8x8 is a 'monarch.' Each tine on a typical mature bull has a name — brow, bez, trez, royal, and the forks above. A symmetrical 6x6 is the classic mature Rocky Mountain bull.
The Boone & Crockett system measures a typical bull's antlers by adding the lengths of both main beams, all the points, and the circumferences at set locations between points, then subtracting asymmetry (the difference between the left and right sides). Rocky Mountain bulls reach the B&C record book around 360 inches (typical); 380+ is exceptional. Roosevelt elk are scored on a separate scale.
Elk drop their antlers from January through early April, so shed hunting peaks in spring as snow recedes. Many western states regulate shed collection to protect wintering wildlife — Colorado, for example, restricts shed hunting on public land west of I-25 until May 1 to keep stressed elk from being pushed during the hardest part of winter. Always check current state regulations before shed hunting.
From the page to the field
Elk Glade guides bull elk on GMU 59 limited entry, on the south slope of Pikes Peak — inside the largest elk population on Earth. Archery, muzzleloader, and four rifle seasons.
