Sixteen Cougars, and this one at the bottom of every weight column
One slide, a bar instead of a booth
Keystone's tagline for the 2100ML is three items long: mid living room, bar dining, master king bed. The feature list adds a king bed with underbed storage, a large shower with a skylight, a black stainless steel sink with a high-rise chef's faucet, a tankless water heater, a 40-inch LED TV, a 10.6 cubic foot refrigerator, and one electric awning with LED lighting. This is one of the two Cougar Sport plans, the comfort tier below the Half-Ton and Cougar sublines, and the whole thing rides on one slide.
Bar dining is the tradeoff. The tagline names no booth dinette and the feature list names no freestanding table, so the bar is the eating surface, and the number of stools that fit at it decides how four people eat inside a plan published for 4 sleepers. The 23MLE, the next-shortest Cougar at 2 ft longer, runs the same mid-living formula with a booth dinette, two freestanding chairs, and a tri-fold sofa; that is what the extra length and 784 lb of dry weight buy.
Where the 2100ML separates from every other short Cougar is the cargo line. Keystone publishes 2,870 lb of carrying capacity, 2 of 16 in the family: 659 lb more than the 23MLE and 770 lb more than the 2700BH, on the same 54 gal fresh, 60 gal gray, and 30 gal black tanks (144 gal in total) that every Sport and Half-Ton plan carries. The lightest trailer in the lineup is also one of the two that can carry the most.
Keystone's 2027 Cougar Sport 2100ML floor plan and figures →Walk it with the slide in and the stools counted
- Count the seats at the bar and find where the stools ride for travel. Keystone names bar dining and nothing else as a place to eat, so that count is the plan's dining capacity.
- Retract the single slide and stand in the mid living room. On the shortest floor in the family the slide carries a large share of the living space, and the retracted aisle is what you get at a rest stop.
- Lift the king mattress for the underbed storage. It is the one interior storage volume Keystone names, and it is where a good part of 2,870 lb of carrying capacity would have to go.
- Measure the roof at the air conditioner. Keystone publishes 12 ft 0 in as a single height figure with the A/C included rather than listed apart, which the record labels as height with A/C. That leaves 1 ft 6 in under a 13 ft 6 in clearance, the most of any Cougar.
Keystone's published figures for the 2100ML
What the extra feet buy elsewhere in the lineup
Chosen by what each plan changes, with every difference computed from the published figures on the records.
2 ft longer and 784 lb heavier, with 90 lb more on the pin. It sleeps 6 instead of 4, keeps one slide, and adds an outdoor kitchen, a booth dinette, two freestanding chairs, and a tri-fold sofa. Carrying capacity drops by 659 lb to 2,211 lb.
Open record →The other Cougar SportCougar Sport 2700BH6 ft longer, 720 lb heavier, and 250 lb more hitch weight, and it sleeps 10 rather than 4 by way of a private bunk room with triple bunks. Still one slide, still 144 gal of tanks; carrying capacity falls 770 lb to 2,100 lb.
Open record →The only Cougar that carries moreCougar 350LLKIts 2,960 lb of carrying capacity beats the 2100ML by 90 lb, and it takes 13 ft 4 in more length, 4,960 lb more dry weight, 1,055 lb more hitch weight, and three more slides to get there. Same sleeping capacity of 4, with a rear kitchen in place of the bar.
Open record →Read dates and what came from where
Length, dry weight, hitch weight, carrying capacity, tank sizes, sleeping capacity, height, and every layout term on this page come from Keystone's 2027 Cougar Sport 2100ML floor-plan page, read on 2026-08-15 for the record's figures and again on 2026-09-12 for the tagline and feature names. Keystone publishes one height figure, 12 ft 0 in, without separating the air conditioner from it; the record shows it as height with A/C. Ranks count all 16 Cougar records on this site, which span the Cougar Sport, Cougar Half-Ton, and Cougar sublines.