Bieg Rzeznika 99.7km: Poland's Legendary Butcher's Run -- Pairs-Only, 3:30 AM Start, and a -47.73% Descent in the Bieszczady Mountains

Bieg Rzeznika (the Butcher's Run) is Poland's most legendary mountain ultra, held annually in June in the Bieszczady Mountains of southeastern Poland. The race covers approximately 99.7km with 4,803m D+ (~48.2 m/km), starting at 3:30 AM from Cisna and following the Bieszczady Red Trail through remote wilderness near the Slovak and Ukrainian border. The race's defining feature is its mandatory pairs format: every competitor must run in a team of two, staying within 100m of each other at all times. If one partner drops, both are eliminated. First held in 2004 with 10 competitors (6 finished); now attracts ~1,196 starters (598 pairs) with ~540 pairs finishing within the 16-hour limit. Winner of Poland's best ultra award in 2014. Part of the XII Festiwal Biegu Rzeznika in 2026. 340 PLN entry. NOT FAR: Rzeszow Airport (RZE) 127 minutes from Cisna. Note: 2026 official listings show Bieg Rzeznika Ultra at 96.5km / 4,900m D+ -- distance discrepancy with Airtable (99.7km / 4,803m) needs Stage 5 verification.

Every runner must enter and race in a team of exactly two people. Partners must stay within 100 metres of each other throughout the entire race -- this is monitored and enforced. If one partner is unable to continue for any reason (injury, illness, timing cutoff), both partners are eliminated from the race. There are no exceptions. All pairings are accepted: mixed, male/male, female/female. The rule was introduced because the Bieszczady Mountains are genuinely remote terrain -- no phone signal in parts of the course, no immediate rescue access on some ridgelines -- and solo runner emergencies were a safety concern. Over time the pairs format has become the race's core identity. Partners must be physically and mentally matched enough to stay together through the descent sections, where pace differences under fatigue can exceed the 100m limit. Choosing the right partner is as important as training for the race itself.

Very hard -- harder than the climbs on average. The DW average downhill gradient is -11.92% (MID tier), which is steeper than the DW average uphill (10.62%). The top descent (km 64.44, 4.56km, 616m drop) averages -13.51% with a GPS-confirmed maximum of -47.73% (ratio 3.53x: clean, not a GPS artifact). A -47.73% gradient is approximately 1-in-2 -- near-vertical terrain requiring hands-and-feet movement on steep Bieszczady grass or rock. This descent arrives immediately after the race's largest climb (583m at 10.80%) in the km 59-69 crux window. The third descent (km 55.44, 3.39km, 400m, -12.00% avg, clean GPS) arrives just before the crux climb, creating a relentless triple-hit sequence at km 55-70 that defines the race. 5.49km of the course sits at 20%+ gradient. Race reports describe previous editions where prolonged rainfall turned Bieszczady trails into mud swamps where even heavy equipment got stuck. In wet conditions, the descent profile is genuinely dangerous -- technical footwear and poles are not optional extras.

The race starts at 3:30 AM in Cisna and follows the iconic Bieszczady Red Trail through the Bieszczady Mountains. The opening move is an immediate 7.32km, 545m climb from near the gun (km 0.06) -- runners tackle the first major ascent in complete darkness. The course passes through remote spruce forest and exposed moorland ridges near the Slovak and Ukrainian border, crossing Bieszczady summits typically ranging from 800-1,300m elevation. The race's most extreme sequence runs from approximately km 55-70: a descent, then the 5.40km / 583m top climb (10.80% avg), then a 4.56km / 616m plunge at -13.51% average. The final third (km 77-99.7) includes a final major ascent (5.22km, 489m) and a 6.93km closing descent. Six festival distances share the broader Bieszczady terrain on the same weekend; the 99.7km is the longest. Aid station count and positions are not confirmed in current research.

Registration opens at biegrzeznika.pl. Entry fee follows a rolling price ladder: 320 PLN (early), 340 PLN (Feb-Apr), 360 PLN (May-Jun), up to 420 PLN at the race office. Despite formal not-sold-out status, registration is historically described as nearly miraculous to obtain -- the race has legendary demand in Poland and places fill fast. Monitor the official site and register as early as possible. Both partners in a team must register simultaneously or link registrations. Getting there: Rzeszow Airport (RZE) is 127 minutes from Cisna -- the closest airport and NOT FAR by DTR standards. Krakow (KRK) is 3-4 hours. A car is strongly recommended -- public transport to Cisna and the Bieszczady mountain villages is limited and infrequent. Accommodation in Cisna and the surrounding area is limited relative to demand; book months in advance for June race weekend.