South Dakota E-Bike Laws 2026: Mickelson Trail Class 1

The 30-second answer

E-bikes are legal across South Dakota under the federal Class 1/2/3 framework adopted by 2019 SB 187 (prime sponsor Sen. Jim White, R-Huron; Senate concurred 32-0 on the House version, House passed 57-8), signed by Governor Kristi Noem. The framework is codified at SDCL Chapter 32-20B, sections 9 through 15 (sections 1-8 are the older general bicycle rules — sidewalk yield, hand signals, racing, identifying-number requirement).

Three things to know about South Dakota:

1. Motor cap is ≤750 W (inclusive), not <750 W. Most three-tier states write the cap as a strict inequality ("less than 750 watts" — Idaho, Kansas, Oklahoma). South Dakota writes it as "seven hundred fifty watts or less" at §32-20B-9, so a bike rated exactly at 750 W is in-spec here.
2. Mickelson Trail = Class 1 only. Under 2025 SB 79 (sponsor Sen. Taffy Howard), signed by Governor Larry Rhoden on 13 March 2025, the 109-mile George S. Mickelson Trail through the Black Hills is statutorily restricted to Class 1 only — Class 2 and Class 3 are barred. House vote 65-5. Violation is a Class 2 misdemeanor (max 30 days / $500).
3. No statewide helmet for Class 1 or Class 2, but Class 3 is layered. §32-20B-14 requires a helmet for Class 3 operators under 18 AND for all passengers regardless of age on a Class 3. Combined with the §32-20B-13 Class 3 operator minimum age of 16 and the §32-20B-15 speedometer requirement, Class 3 carries the most regulatory weight of the three classes.

Path access (statewide) is permissive for Class 1 + 2 under §32-20B-12 and restrictive for Class 3 (Class 3 is barred from paths unless within or adjacent to a highway or expressly authorized). No driver license, no registration, no title, no plate, no insurance for any class under Chapter 32-20B.

Quick reference

Two practical reads. First, South Dakota's statewide statute is a clean three-class regime — no license, no registration, no insurance, no helmet for Class 1 or Class 2, no minimum age for Class 1 or Class 2. Class 3 carries genuine regulatory weight (under-18 operator helmet, all-passenger helmet, age 16+, speedometer, no path access). Second, the Mickelson Trail is the single biggest practical constraint: South Dakota's premier 109-mile rail-trail is now Class 1 only by statute (SB 79, 2025), so Class 2 throttle riders are confined to roads and other paths where the local agency hasn't banned them, and Class 3 is barred from the Mickelson regardless.

The three-class system in South Dakota

South Dakota defines an "electric bicycle" at SDCL §32-20B-9:

An electric bicycle is a bicycle or a tricycle that is equipped with a seat or saddle, with operable pedals for propulsion, and with an electric motor of seven hundred fifty watts or less.

• Class 1 — the motor provides assistance only when the rider is pedaling, and ceases to provide assistance when the bicycle reaches the speed of 20 mph.
• Class 2 — the motor may be used exclusively to propel the bicycle (throttle), and is not capable of providing assistance when the bicycle reaches the speed of 20 mph.
• Class 3 — the motor provides assistance only when the rider is pedaling, and ceases to provide assistance when the bicycle reaches the speed of 28 mph.

The framework was enacted by SB 187 during the 2019 Regular Session — prime sponsor Sen. Jim White (R-Huron). The Senate concurred 32-0 on the House version (which had passed 57-8 after a typo fix from "peddle" to "pedal"). Governor Kristi Noem signed it into law.

The "≤750 W" inclusive cap (not strict)

A small but real drafting choice: §32-20B-9 writes the motor cap as "seven hundred fifty watts or less" — an inclusive cap. Idaho (§49-106), Kansas (§8-1489), and Oklahoma write it as "less than 750 watts," a strict inequality. The practical effect is minor — most retail e-bikes are advertised as 750 W or 500 W nominal — but a bike labeled exactly 750 W is in-spec in South Dakota and (arguably) out-of-spec in Idaho on the strict reading.

Where you can ride

Roads + bike lanes

Same rights and duties as a regular bicycle. All three classes may use roads and bike lanes. No statute carves out Class 3 from road operation — the §32-20B-12 path restriction does not apply to highways.

Multi-use paths — Class 1 + 2 permissive, Class 3 barred

SDCL §32-20B-12 is the path rule:

• Class 1 and Class 2 may be operated on bicycle paths and multi-use paths unless prohibited by the local authority or state agency with jurisdiction.
• Class 3 is NOT permitted on bicycle paths or multi-use paths unless the path is within or adjacent to a highway, or unless the local authority or state agency expressly authorizes it.

This puts South Dakota in the standard three-tier "Class 3 barred from paths" camp (alongside Arizona, Connecticut, Iowa, Kansas via the KDWP 20 mph cap, Maryland, Massachusetts, Michigan, Minnesota, Nebraska, New York, North Carolina, North Dakota, Ohio, Pennsylvania, Rhode Island, Tennessee, Vermont, Washington, West Virginia, Wisconsin via the DNR 15 mph cap, and Wyoming).

The George S. Mickelson Trail — Class 1 only by statute

The George S. Mickelson Trail is South Dakota's headline rail-trail: 109 miles from Edgemont in the south to Deadwood in the north, built on the former Burlington Northern corridor through the Black Hills. Named for Governor George S. Mickelson (1987-1993), it is the longest rail-trail in the state and managed by SD Game Fish & Parks (GFP).

Until 2025 the trail was Class 1 only by GFP policy. In 2025 the legislature codified that restriction:

• 2025 SB 79 — sponsor Sen. Taffy Howard. Signed by Governor Larry Rhoden on 13 March 2025. House vote 65-5.
• Class 1 only. Class 2 (throttle to 20 mph) and Class 3 (pedal-assist to 28 mph) are statutorily barred from the entire trail.
• Violation = Class 2 misdemeanor under SD law (maximum 30 days in jail and/or $500 fine).
• Trail-use pass required for users 12+ — $5/day or $20/year. Passes must be carried on the person or attached to the bike; users unable to show a pass are subject to a fine.
• Trail is closed half an hour after sunset to half an hour before sunrise.
• No motorized vehicles (the snowmobile carve-out between Deadwood and Dumont is unrelated to e-bikes).

The 2025 bill's sponsor, Sen. Taffy Howard, framed it as a rider-responsibility rule: "It is up to the rider to ensure you are riding what you should be." AARP South Dakota opposed the restriction on accessibility grounds (Class 2 throttle benefits older riders), but the bill passed both chambers comfortably.

Custer State Park

Custer State Park is South Dakota's flagship state park — 71,000 acres in the Black Hills, home to the wildlife loop, Sylvan Lake, the Needles Highway, and a multi-use trail network with horse/hiking/biking shared trails. Bicycles are permitted on the multi-use trail system; the statewide §32-20B-12 path rule keeps Class 3 off non-highway paths there by default unless GFP expressly authorizes a route. Always check the trailhead sign and the GFP listing for any specific trail before riding a Class 3.

Sidewalks

SDCL §32-20B-2 + §32-20B-3 govern sidewalk operation. A cyclist on a sidewalk has the rights and duties of a pedestrian but must stop before entering a crosswalk or highway from a sidewalk. While on the sidewalk, the rider must yield to pedestrians and give an audible signal before overtaking and passing a pedestrian. Violation is a Class 2 misdemeanor. These rules apply equally to electric bicycles under Chapter 32-20B.

Local sidewalk rules layer on top. As of January 2024 Spearfish had considered but not enacted a city e-bike ordinance — the city floated rules for the recreation path and Lookout Mountain singletrack but the Parks and Recreation Director flagged enforcement difficulty.

Federal lands

• Mount Rushmore National Memorial — per the NPS national e-bike policy and DOI Secretary's Order 3376, e-bikes are treated as bicycles wherever bicycles are allowed. The memorial's practical bicycle footprint is limited to the main access road and the Avenue of Flags / parking areas; the Presidential Trail and other walking paths are pedestrian-only.
• Badlands National Park — e-bikes allowed on paved park roads (Badlands Loop Road / SD-240, Sage Creek Rim Road). Hiking trails (Notch Trail, Door Trail, Window Trail, Castle Trail, Saddle Pass, Medicine Root Loop) are pedestrian-only; this is the standard NPS posture under Secretary's Order 3376.
• Wind Cave National Park — per NPS guidance, the park has paved highways and established roads suitable for bicycling; backcountry hiking trails are closed to bicycles. E-bikes follow the same rule.
• Black Hills National Forest (USFS) — per the USFS national e-bike policy, all three classes generally permitted on motorized roads/trails; on non-motorized singletrack only where specifically designated through a local public-process review. Varies by Ranger District (Mystic, Hell Canyon, Bearlodge, Northern Hills).

Helmet, age, license, registration

South Dakota's baseline — no DMV anything, no helmet rule for Class 1 or Class 2, no minimum age for Class 1 or Class 2 — is permissive. Class 3 carries the most weight: 16+ operator, helmet under 18, helmet for all passengers regardless of age, functioning speedometer, no path access by default, no Mickelson Trail access at all under SB 79 (2025).

Pending + recent legislation

• 2025 SB 79 — sponsor Sen. Taffy Howard. Signed by Governor Larry Rhoden on 13 March 2025. Codifies that only Class 1 e-bikes are permitted on the George S. Mickelson Trail. House vote 65-5. Violation = Class 2 misdemeanor. This is the headline recent change.
• 2024 session — no e-bike-specific bills enacted that change the §32-20B-9 framework. A 2024 House bill considered (but did not pass) trail-specific e-bike rules; the legislature returned to the issue in 2025 and produced SB 79.
• 2023 session — no e-bike-specific bills enacted.
• 2019 SB 187 — sponsor Sen. Jim White (R-Huron). Senate concurred 32-0 on the House version (House 57-8). Signed by Governor Kristi Noem. The enacting bill that created the three-class framework at §§32-20B-9 through 32-20B-15.

Verify against the South Dakota Legislature bill tracker before relying on this for any active dispute.

Penalties for non-compliance

Three enforcement pathways apply:

1. Manufacturing-label violation (§32-20B-10). Selling or distributing an e-bike without the permanent class / speed / wattage label is a Class 2 misdemeanor (max 30 days / $500).
2. Sidewalk violation (§32-20B-3). Failing to yield to a pedestrian or to give an audible signal before passing on a sidewalk is a Class 2 misdemeanor.
3. Mickelson Trail violation (SB 79, 2025). Operating a Class 2 or Class 3 on the Mickelson Trail is a Class 2 misdemeanor (max 30 days / $500). The trail-use-pass requirement carries a separate fine for users 12+ without a valid pass.

A bike that exceeds the §32-20B-9 motor cap (>750 W) or whose throttle propels it beyond the class speed cap falls outside Chapter 32-20B and may fall into the motor-driven cycle / motorcycle regime under SDCL Title 32 Chapter 20 — full driver license, registration, title, plate, and liability insurance required, with the standard misdemeanor penalties for driving without each.

Special situations

Out-of-state riders

A bicycle that meets the §32-20B-9 definition is street-legal in South Dakota regardless of where it was bought, as long as it carries the manufacturer's permanent class label. The Class 3 operator-age and helmet rules apply to the rider, not the bike. The Mickelson Trail Class-1-only rule applies on the trail regardless of where the bike was registered or purchased.

DIY / converted e-bikes

A homebuilt or conversion-kit e-bike still qualifies under §32-20B-9 if it has fully operable pedals, a motor at or below 750 W, and behaves within one of the three class speed caps. The §32-20B-10 labeling requirement is on the manufacturer or distributor; for a DIY build the practical workaround is a clearly affixed sticker noting the class, max assisted speed, and wattage so an enforcement officer or trail ranger can read the configuration without disassembly.

Cargo + family hauling

South Dakota has no specific cargo-e-bike rule. The §32-20B-14 all-passengers-helmet-on-Class-3 rule is the relevant clause for parents using a longtail or front-loader Class 3 — any passenger on a Class 3, regardless of age, must wear a helmet. On Class 1 or Class 2 (the only classes allowed on the Mickelson Trail), there is no statewide passenger helmet rule.

E-bike rental fleets

Black Hills rental operators (e.g., Black Hills Power Bikes & Rentals in Hill City) typically deploy Class 1 fleets for the Mickelson Trail to satisfy SB 79. Outside the trail, Class 2 throttle rentals are common where the local agency hasn't specifically prohibited them.

Bottom line

South Dakota runs a clean three-class regime under SDCL Chapter 32-20B: no driver license, no registration, no title, no plate, no insurance, no helmet rule for Class 1 or Class 2, no minimum age for Class 1 or Class 2. The motor cap is an inclusive ≤750 W (§32-20B-9 — slightly more permissive than the "less than 750 W" of Idaho, Kansas, and Oklahoma). The Class 3 stack is real (operator 16+ under §32-20B-13, helmet under 18 plus all passengers under §32-20B-14, functioning speedometer under §32-20B-15, no path access by default under §32-20B-12). And the George S. Mickelson Trail — the state's 109-mile flagship rail-trail through the Black Hills — is now Class 1 only by statute under 2025 SB 79 signed by Governor Larry Rhoden on 13 March 2025. Read the trailhead sign, ride within your class, and South Dakota's statute leaves you alone.

Sources

• SDCL Chapter 32-20B — full chapter (electric bicycles + bicycle rules)
• SDCL §32-20B-9 — Electric bicycle definition + three classes
• SDCL §32-20B-12 — Path access (Class 1 + 2 permissive; Class 3 barred unless within/adjacent to highway)
• SDCL §32-20B-3 — Sidewalk operation; yield to pedestrian; audible signal
• 2019 SB 187 — Enacting bill (Sen. Jim White; signed Gov. Kristi Noem)
• 2025 SB 79 — Mickelson Trail Class-1-only restriction (Sen. Taffy Howard; signed Gov. Larry Rhoden 13 Mar 2025)
• George S. Mickelson Trail — SD Game Fish & Parks
• Custer State Park — SD Game Fish & Parks
• SD Searchlight — Mickelson Trail e-bike limitation sent to governor (Feb 2025)
• SDPB — Bill allowing some electric bikes on Mickelson Trail heads to House (Feb 2025)
• KELO — Senate Agrees To Regulations For Electric Bicycles In South Dakota (2019)
• Spearfish, SD — South Dakota Bicycle Laws (city summary)
• Electric Bike Report — Spearfish E-Bike Ordinance discussion (Jan 2024)
• Mount Rushmore National Memorial (NPS)
• Badlands National Park (NPS)
• Wind Cave National Park — FAQs (bicycling)
• NPS — Electric Bicycles in National Parks
• DOI Secretary's Order 3376 — federal lands e-bike policy
• USFS national e-bike policy
• PeopleForBikes State E-Bike Law Tracker