Sources

• Distances, the line of the road and fuel pumps: © OpenStreetMap contributors, Open Database Licence. Routes worked out with the Open Source Routing Machine.
• Heights: NASA Shuttle Radar Topography Mission, public domain, served by Open Topo Data.
• National Highway 110 (India)

  en.wikipedia.org · Encyclopedia · dated 17 July 2026

• A COMPLETE Sandakphu Travel Guide for all Trekkers and Tourists

  discoverwithdheeraj.com · Published guide · dated 17 September 2026

• Sandakphu

  en.wikipedia.org · Encyclopedia · dated 14 September 2026

• Tour of Sandakphu and Phalut by Car

  darjeeling-tourism.com · Published guide

• Bikers Will Not be Allowed in Sandakphu from Now Onwards: Notice by Divisional Forest Officer

  topfivebuzz.com · Published guide · dated 11 April 2018

• Singalila National Park

  en.wikipedia.org · Encyclopedia · dated 21 September 2026

• Health advisory for tourists visiting Sandakphu

  darjeelingpolice.wb.gov.in · Official page · seen in search results only

• Dudhia Bridge to reopen on Monday; Rohini Slip repair underway

  millenniumpost.in · News report · dated 27 October 2025

• West Bengal: over 20 people lost lives due to rainfall, landslides in Darjeeling district

  newsonair.gov.in · News report · dated 5 October 2025

• NH-10 reopens after six days of landslide disruption in Sikkim and Kalimpong

  newsonair.gov.in · News report · dated 17 August 2025

• IndianOil locator: Bishwa Kiran Fuels, Kalimpong

  locator.iocl.com · Official page

• HP locator: Tashis Service Station, Lower Bridle Road

  petrolpump.hpretail.in · Official page

A gap is not a fact. It means we looked and found no source.

• The text and number of the April 2018 forest notice barring motorcycles from the Sandakphu road were not found; it is known only from a blog and a travel site.
• No official West Bengal Forest Department page found for Singalila entry rules, fees or closure dates.
• Darjeeling Police health advisory for Sandakphu returned an access error (HTTP 403) and was not read.
• No source found stating whether Indian or foreign citizens need any permit for Darjeeling and Kalimpong towns.
• Usual number of days for the whole Siliguri, Darjeeling, Kalimpong loop not sourced; the figure given covers only the Sandakphu leg.
• Highway number for the Kalimpong leg not sourced beyond National Highway 10 along the Teesta.
• Entry fee amounts come only from a blog and are left out.
• No year-by-year opening or closing dates found for the Sandakphu road.
• Videos not collected.
• Some stretch distances are doubtful. The open map may not know the road riders use, so the routing service went the long way round.