One firm caution
Mathura–Braj is a heavy bhang (cannabis) region, and thandai or lassi sold at temple-side and roadside stalls can be laced with bhang while looking and being named exactly like the ordinary drink. Avoid loose thandai or lassi from unverified stalls, especially around Holi and Mahashivratri; stick to sealed bottled water, coconut water or sweets from established halwais. On a hot barefoot parikrama day, that simple rule keeps the pilgrimage calm and safe.