# 22 Locked Spring · Ilam Bitumen's Spring چشمه قیر

# 270 Locked Lake · Wetland · Chaharmahal and Bakhtiari Bizhgerd lagoon تالاب بیژگرد

# 158 Locked Peak · 2,000–2,999 m · Markazi 2260 m Black mountain سیاه کوه

# 1113 Locked Peak · 3,000–3,999 m · Isfahan 3020 m Bohorz بهرز

# 12 Locked Island or coast · West Azerbaijan Bon Ashk Island جزیره بن اشک

# 968 Locked Peak · 3,000–3,999 m · Hormozgan 3131 m Boneh بنه

# 1055 Locked Peak · 3,000–3,999 m · Semnan 3060 m Boneh-Kuh بُنه کوه

# 54 Locked Peak · 4,000–4,999 m · Isfahan 4313 m Bonroud بن رود

# 33 Locked Protected area · Semnan Boola Protected Area منطقه محافظت شده بولا

# 583 Locked Peak · 3,000–3,999 m · West Azerbaijan 3470 m Booz Sina

# 51 Locked Peak · 4,000–4,999 m · Tehran 4316 m Borj برج

# 869 Locked Peak · 3,000–3,999 m · Alborz 3200 m Borj Shah Karam برج شاه کرم

# 09 Locked Geological formation · Fars Borkh Salt Dome گنبد نمکی برخ

# 34 Locked Protected area · Yazd Boroueeyeh Wildlife Refuge پناهگاه حیات وحش بوروئیه

# 746 Locked Peak · 3,000–3,999 m · Mazandaran 3300 m Borz برز

# 10 Locked Geological formation · Hormozgan Bostaneh Salt Dome گنبد نمکی بستانه

# 35 Locked Protected area · Gilan Boujagh National Park پارک ملی بوجاق

# 322 Locked Peak · 3,000–3,999 m · Mazandaran 3815 m Boum بوم

# 757 Locked Peak · 3,000–3,999 m · East Azerbaijan 3298 m Bouzghoush بزقوش

# 36 Locked Protected area · East Azerbaijan Boz Ghoush Protected Area منطقه حفاظت شده بزقوش

# 12 Locked Valley or canyon · Isfahan Boz Mordeh بز مرده

# 839 Locked Peak · 3,000–3,999 m · Mazandaran 3230 m Bozabon بزابن

# 725 Locked Peak · 3,000–3,999 m · Mazandaran 3322 m Bozakuh بزاکوه

# 13 Locked Island or coast · Khuzestan Buneh جزیره بونه

# 37 Locked Protected area · Kermanshah Buzin and Merkhil Protected Area منطقه حفاظت شده بوزین و مرخیل

# 189 Locked Peak · 2,000–2,999 m · Isfahan 2205 m Bāgh-e Band-e Kūh باغ بند کوه

# 297 Locked Peak · 2,000–2,999 m · Kerman 2768 m Bāghi باغی

# 01 Locked Desert · Yazd Caracal Desert کویر کاراکال

# 427 Locked Peak · 2,000–2,999 m · Chaharmahal and Bakhtiari 2630 m Castle Mountain کوه قلعه

# 38 Locked Protected area · Mazandaran Central Alborz Protected Area منطقه محافظت شده البرز مرکزی

# 53 Locked Peak · 4,000–4,999 m · Isfahan 4314 m Central Howze Dal حوض دال مزکری

# 23 Locked Spring · Markazi Ceramic Spring چشمه سرامیک

# 11 Locked Geological formation · Hormozgan Chah Mosallam Salt Dome گنبد نمکی چاه مسلم

# 841 Locked Peak · 3,000–3,999 m · Mazandaran 3229 m Chahak چاهک

# 12 Locked Geological formation · Fars Chahar Berkeh Salt Dome گنبد نمکی چهاربرکه

# 39 Locked Protected area · Mazandaran Chaharbagh Protected Area منطقه محافظت شده چهارباغ

# 13 Locked Geological formation · Fars Chahoo Salt Dome گنبدنمکی چاهو

# 373 Locked Peak · 1,000–1,999 m · East Azerbaijan 1730 m Chakhar چاخار

# 896 Locked Peak · 3,000–3,999 m · Tehran 3185 m Chakhmagh Sangh چخماق سنگ

# 433 Locked Peak · 3,000–3,999 m · Alborz 3646 m Chal Gardan چال گردن

# 303 Locked Peak · 1,000–1,999 m · Lorestan 1982 m Chal Vali Khan چال ولی خان

# 203 Locked Lake · Dam or reservoir · Markazi Chal-e-Homa Dam Lake سد خاکی چالهما

# 13 Locked Valley or canyon · Tehran Chalak Valley دره چالک

# 28 Locked Forest · Forest park · Mazandaran Chaldarreh Forest Park چالدره

# 544 Locked Lake · Dam or reservoir · Razavi Khorasan Chalidarreh Lake دریاچه سد چالیدره

# 16 Locked Peak · 4,000–4,999 m · Mazandaran 4511 m Chaloon چالون

# 35 Locked River · Mazandaran Chalus River رودخانه چالوس

# 24 Locked Spring · Kurdistan Cham-e Aqa Veysi چم آقا ویسی

# 36 Locked River · Kurdistan Cham-e Khan چم خان

# 37 Locked River · Kurdistan Cham-e Sarab-e Qamish چم سراب قامیش

# 373 Locked Peak · 2,000–2,999 m · Razavi Khorasan 2692 m Chaman چمن یک

# 910 Locked Peak · 3,000–3,999 m · Tehran 3175 m Chambareh Band چمبره بند

# 221 Locked Peak · 2,000–2,999 m · Markazi 2156 m Chameh Tarikeh چشمه تاریکه

# 105 Locked Peak · 2,000–2,999 m · East Azerbaijan 2340 m Chanagh چناق

# 403 Locked Peak · 1,000–1,999 m · Semnan 1590 m Chandaran چندران

# 960 Locked Peak · 3,000–3,999 m · Mazandaran 3135 m Changoon چنگون

# 159 Locked Peak · 4,000–4,999 m · Mazandaran 4063 m Chapakrou چپکرو

# 884 Locked Peak · 3,000–3,999 m · Tehran 3193 m Chapdarreh چپ دره

# 40 Locked Protected area · East Azerbaijan Charoimagh Protected Area منطقه حفاظت شده چاراویماق

# 25 Locked Spring · Kurdistan Chaw Rash Spring کانی چاو ره‌ش