Description
Metsähallitus publishes the official Haukankierros trail sheet on Luontoon.fi. UUVI’s Nuuksio destination overview lists Haukkalampi’s street address, warns that park roads get busy on summer weekends, and repeats national-park basics such as keeping dogs leashed and parking only in marked lots.
Haukankierros Trail is about 3.9 km as a day loop in Nuuksio National Park around Haukkalampi and Mustalampi. The national park spans Espoo, Kirkkonummi, and Vihti; our directory entry is filed under Vihti while the Haukkalampi parking and service area sits on the Espoo side. The loop is short but feels rocky and strenuous in places: steep climbs, stair flights (including a roughly 30-step stretch visitors often mention), roots and stones underfoot, and wooden duckboards in wet hollows. The best-known viewpoint is an open rock toward the Myllypuro valley. Marking follows Nuuksio’s blue diamond pattern along the walking line.
From the Haukkalampi end you quickly reach small Iso-Holma pockets such as Iso-Holman pieni telttailualue and Iso-Holman pieni tulentekopaikka, then swing toward Haukanholman laituri and Haukanholman tulentekopaikka above the lake. About a kilometre in, Mustalampi gathers an overnight and picnic cluster—Mustalammen länsipuolen telttailualue, Mustalampi tulipaikka2, Mustalammen pieni keittokatos, Mustalammen tulentekopaikka, Mustalammen keittokatos, plus Mustalammen itäpuolen telttailualue; dry toilets sit with that group at Mustalammen varastokäymälä and Mustalammen pieni käymälä. Nearer Haukkalampi’s service corner you pass Haukkalammen laituri, Haukanpesän laituri, and Haukkalampi Haukanpesä varaussauna (a bookable sauna Natura Viva describes beside the Hawk Nest services), with Haukkalammen pieni pysäköintialue and Haukkalampi iso pysäköintialue a short detour for drivers. The trace returns through Haukanholman telttailualue, Haukanholman keittokatos, and Haukanholman varastokäymälä before closing the ring.
Retkipaikka published Luontopolkumies Mika Markkanen’s half-day account with timing notes, junction commentary toward Kattila, and photos of how crowded the Haukkalampi shoreline can feel on a sunny Saturday—useful colour even though mileage in blogs rounds slightly above our mapped length. Tony Hagerlund’s regional hiking notes add a clear English photo walk-through of the rock lookout, the shared shore section with Punarinnan kierros and Korpinkierrros, and why parents should watch footing on the crags. On the map the same shoreline meets Nahkiaispolku, Punarinnan kierros, Korpinkierrros, Yhdysreitti Kattila - Mustalampi, and the marked Haukkalampi pyöräilyreitti; treat the bike corridor as bike-priority where it overlaps foot traffic, per park rules.