Take an early Shatabdi/express from New Delhi to Kalka (typical duration ~4–5h) to connect to Shimla; this is the fastest and most reliable rail option toward the toy-train/road to Shimla.
Option A: Kalka–Shimla toy train for the heritage experience (check narrow-gauge availability; seasonal). Option B: taxi from Kalka to Shimla ~3h by road — faster and flexible.
Short riverside walk to Chalal (30–45 min walk one-way) and café breakfast — peaceful valley vibes and short easy trek options. No formal open/close timings (daylight access).
Evening walk around the Tsuglagkhang complex (main temple area accessible roughly 9:00am–5:00pm, but the area around it is good for an evening stroll); check access times if you plan to enter museum/temple interiors.
Drive ~30–40 min to Khajjiar (the 'mini Switzerland' of India): open all day, flat meadow surrounded by deodar trees — ideal for leisurely walks and photos.
This day is the most ambitious: drive toward Lahaul/Spiti region (Keylong/Losar direction) to sample high-altitude landscape — expect long mountain driving (8–12+ hours) and rough roads; permits and 4x4 strongly recommended in some sections.
Brief stops at scenic viewpoints in the Lahaul approach (if weather/road permits). This is a quick glance rather than a true Spiti visit — full Spiti (Kaza, Tabo, Dhankar) requires 3–5 extra days.
Begin return drive to Shimla (expect many hours — this leg may run into night); plan buffer for slow mountain sections. Consider breaking return in a midway town if needed.