, ▁especially , ▁el k . ▁ ▁A ▁large ▁her d ▁of ▁el k ▁sum mers ▁in ▁the ▁w ilder ness . ▁In ▁addition , ▁as ▁of ▁ 2 0 0 4 ▁there ▁are ▁ 7 3 0 ▁head ▁of ▁cattle ▁that ▁are ▁permitted ▁to ▁gra ze ▁inside ▁San ▁Pedro ▁Park s . ▁ ▁Cl imate ▁ ▁Part ▁of ▁the ▁park ▁has ▁a ▁hum id ▁contin ental ▁climate ▁of ▁the ▁warm - sum mer ▁type ▁( K ö ppen : ▁D fb ) ▁and ▁higher ▁areas ▁a ▁contin ental ▁sub ar ctic ▁climate ▁( D fc ) ▁with ▁short ▁sum mers ▁( using ▁the ▁ 0 ° C ▁is ot erm ), ▁being ▁the ▁most ▁sou ther ly ▁place ▁in ▁North ▁America ▁where ▁the ▁second ▁clim atic ▁type ▁is ▁found , ▁except ▁for ▁isolated ▁mountains ▁to ▁the ▁south ▁where ▁the ▁scale ▁of ▁some ▁maps ▁do ▁not ▁allow ▁the ▁visual ization . ▁ ▁Rec re ation ▁ ▁About ▁ 1 0 0 ▁miles ▁of ▁tra ils ▁cr iss cross ▁San ▁Pedro ▁Park s . ▁ ▁The ▁most ▁popular ▁is ▁V ac as ▁Tra il , ▁ 7 . 5 ▁miles ▁( 1 2   km ) ▁long . ▁ ▁The ▁trail head ▁is ▁on ▁Forest ▁Road ▁ 7 0 ▁and ▁the ▁trail ▁leads ▁north ▁past ▁San ▁Greg orio ▁Lake ▁and ▁continues ▁to ▁San ▁Pedro ▁Park , ▁the ▁largest ▁me adow ▁in ▁the ▁w ilder ness . ▁ ▁V ac as ▁trail ▁intersect s ▁many ▁other ▁tra ils . ▁ ▁About ▁ 8 ▁miles ▁(