Boston Marathon logo
BOSTON MARATHON 2023

Alison Sukolsky

Bib: 3318•F

PA

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 26622
Gender (Female)
#0 / 11423
Top 44%
Division (F18-39)
#0 / 4884
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent
Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
5K· 3.11 mi
7:33/mi
23:27
↑ 97↓ 3451.5%
10K· 6.21 mi
7:45/mi
47:32
↑ 79↓ 1380.4%
15K· 9.32 mi
7:59/mi
1:12:20
↑ 67↓ 78
20K· 12.43 mi
7:58/mi
1:37:04
↑ 106↓ 860.1%
Half· 13.11 mi
7:37/mi
1:42:16
↑ 19↓ 370.5%
25K· 15.53 mi
8:12/mi
2:02:09
↑ 66↓ 880.2%
30K· 18.64 mi
9:07/mi
2:30:30
↑ 181↓ 1480.2%
20M
9:20/mi
2:43:11
↑ 64↓ 500.2%
21M
10:57/mi
2:54:08
↑ 106↓ 241.6%
35K· 21.75 mi
7:59/mi
3:00:06
↑ 17↓ 861.7%
23M
9:53/mi
3:12:29
↑ 23↓ 630.6%
24M
8:59/mi
3:21:28
↓ 821.3%
40K· 24.85 mi
8:53/mi
3:29:04
↓ 200.3%
25.2M
10:29/mi
3:32:41
↑ 13↓ 160.2%
Finish· 26.22 mi
8:29/mi
3:41:20
↑ 22↓ 21

The Course

Is this your race?

Claim it — unlock a deeper AI report on this race, free

A personalized Race Performance Report that goes beyond this page — emailed to you, built from your real splits.

Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:42:16
Pace7:48 /mi
2nd Half
Distance13.11 mi
Time1:59:04
Pace9:05 /mi
📊Positive Split: 16.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:24:5523:277:3323:27
7:33
-
10K
6.21 mi10:49:0047:327:3924:05
7:45
+0:12
15K
9.32 mi11:13:481:12:207:4624:48
7:59
+0:14
20K
12.43 mi11:38:321:37:047:4924:44
7:58
-0:01
Half
13.11 mi11:43:441:42:167:485:12
7:37
-0:21
25K
15.53 mi12:03:372:02:097:5219:53
8:12
+0:35
30K
18.64 mi12:31:582:30:308:0428:21
9:07
+0:55
20M
20.00 mi12:44:392:43:118:1012:41
9:20
+0:13
21M
21.00 mi12:55:362:54:088:1810:57
10:57
+1:37
35K
21.75 mi13:01:343:00:068:175:58
7:59
-2:58
23M
23.00 mi13:13:573:12:298:2212:23
9:53
+1:54
24M
24.00 mi13:22:563:21:288:248:59
8:59
-0:54
40K
24.85 mi13:30:323:29:048:257:36
8:53
-0:06
25.2M
25.20 mi13:34:093:32:418:263:37
10:29
+1:36
Finish
26.22 mi13:42:483:41:208:278:39
8:29
-2:00

Checkpoints & Pacing

📈Pace Line

Pace Progression

Track your pace changes throughout the race. Dot colors mark your quickest to easiest segments, relative to your own pace.

Fastest Pace

7:33 /mi

Average Pace

8:27 /mi

Slowest Pace

10:57 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:17:28

35% of race

Time at Steady Pace

1:15:53

34% of race

Time at Slower Pace

1:07:59

31% of race

Average Pace: 8:26 /mi

Loading chart...
Faster pace (< avg)
Steady pace (≈ avg)
Slower pace (> avg)

🎨Heatmap

Pace Heatmap

Where you sped up and eased off relative to your own pace across the race. Colors are relative to your own range, not to other runners.

Loading...
0mi6.6mi13.1mi19.7mi26.2mi
Pace:
Faster
Steady
Slower

Click or hover over segments to see details

✨Sparklines

Checkpoint Splits with Pace Trends

Overall Pace Trend

CheckpointDistanceTime of DayTimeAvg PaceSegmentPaceTrendRank
5K
3.11 mi10:24:5523:277:3323:27
7:33
#10080
10K
6.21 mi10:49:0047:327:3924:05
7:45
#11356
15K
9.32 mi11:13:481:12:207:4624:48
7:59
#12323
20K
12.43 mi11:38:321:37:047:4924:44
7:58
#12494
Half
13.11 mi11:43:441:42:167:485:12
7:37
#12424
25K
15.53 mi12:03:372:02:097:5219:53
8:12
#12713
30K
18.64 mi12:31:582:30:308:0428:21
9:07
#13879
20M
20.00 mi12:44:392:43:118:1012:41
9:20
#14281
21M
21.00 mi12:55:362:54:088:1810:57
10:57
#14838
35K
21.75 mi13:01:343:00:068:175:58
7:59
#14716
23M
23.00 mi13:13:573:12:298:2212:23
9:53
#15089
24M
24.00 mi13:22:563:21:288:248:59
8:59
#15169
40K
24.85 mi13:30:323:29:048:257:36
8:53
#15191
25.2M
25.20 mi13:34:093:32:418:263:37
10:29
#15289
Finish
26.22 mi13:42:483:41:208:278:39
8:29
#15267
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi100801905190514257(Top 54%)4237(Top 37%)4237(Top 87%)
10K6.21 mi3.10 mi11356-12762525-6202525-62012714(Top 48%)3267(Top 29%)3267(Top 67%)
15K9.32 mi3.11 mi12323-9673080-5553080-55514257(Top 54%)4237(Top 37%)4237(Top 87%)
20K12.43 mi3.11 mi12494-1713199-1193199-11913125(Top 49%)3618(Top 32%)3618(Top 74%)
Half13.11 mi0.68 mi12424+703164+353164+3511318(Top 43%)2549(Top 22%)2549(Top 52%)
25K15.53 mi2.42 mi12713-2893343-1793343-17914256(Top 54%)4370(Top 38%)4370(Top 89%)
30K18.64 mi3.11 mi13879-11664068-7254068-72517814(Top 67%)6533(Top 57%)6533(Top 134%)
20M20.00 mi1.36 mi14281-4024349-2814349-28118160(Top 68%)6823(Top 60%)6823(Top 140%)
21M21.00 mi1.00 mi14838-5574690-3414690-34120720(Top 78%)8302(Top 73%)8302(Top 170%)
35K21.75 mi0.75 mi14716+1224634+564634+5612030(Top 45%)3466(Top 30%)3466(Top 71%)
23M23.00 mi1.25 mi15089-3734899-2654899-26519667(Top 74%)7774(Top 68%)7774(Top 159%)
24M24.00 mi1.00 mi15169-804956-574956-5717161(Top 64%)6440(Top 56%)6440(Top 132%)
40K24.85 mi0.85 mi15191-224987-314987-3115570(Top 58%)5615(Top 49%)5615(Top 115%)
25.2M25.20 mi0.35 mi15289-985064-775064-7719070(Top 72%)7531(Top 66%)7531(Top 154%)
Finish26.22 mi1.02 mi15267+225061+35061+315376(Top 58%)5469(Top 48%)5469(Top 112%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 54%
×21story building
+97ft-345ft

Overall

14257

Females

4237

F18-39

4237

5K→10K

3.1 - 6.2 mi

Top 48%
×5story building
+79ft-138ft

Overall

12714

Females

3267

F18-39

3267

10K→15K

6.2 - 9.3 mi

Top 54%
×3story building
+67ft-78ft

Overall

14257

Females

4237

F18-39

4237

15K→20K

9.3 - 12.4 mi

Top 49%
×5story building
+106ft-86ft

Overall

13125

Females

3618

F18-39

3618

20K→Half

12.4 - 13.1 mi

Top 43%
×2story building
+19ft-37ft

Overall

11318

Females

2549

F18-39

2549

Half→25K

13.1 - 15.5 mi

Top 54%
×4story building
+66ft-88ft

Overall

14256

Females

4370

F18-39

4370

25K→30K

15.5 - 18.6 mi

Top 67%
×9story building
+181ft-148ft

Overall

17814

Females

6533

F18-39

6533

30K→20M

18.6 - 20.0 mi

Top 68%
×5story building
+64ft-50ft

Overall

18160

Females

6823

F18-39

6823

20M→21M

20.0 - 21.0 mi

Top 78%
×8story building
+106ft-24ft

Overall

20720

Females

8302

F18-39

8302

21M→35K

21.0 - 21.8 mi

Top 45%
×7story building
+17ft-86ft

Overall

12030

Females

3466

F18-39

3466

35K→23M

21.8 - 23.0 mi

Top 74%
×5story building
+23ft-63ft

Overall

19667

Females

7774

F18-39

7774

23M→24M

23.0 - 24.0 mi

Top 64%
×6story building
+12ft-82ft

Overall

17161

Females

6440

F18-39

6440

24M→40K

24.0 - 24.9 mi

Top 58%
×1story
+6ft-20ft

Overall

15570

Females

5615

F18-39

5615

40K→25.2M

24.9 - 25.2 mi

Top 72%
×1story
+13ft-16ft

Overall

19070

Females

7531

F18-39

7531

25.2M→Finish

25.2 - 26.2 mi

Top 58%
×2story building
+22ft-21ft

Overall

15376

Females

5469

F18-39

5469

Passing Analysis

Category:
Athletes Passed
688
Passed By
5875
Net Change
-5187
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#10080
5K → 10K361312-1276#10080#11356
10K → 15K18985-967#11356#12323
15K → 20K115286-171#12323#12494
20K → Half788+70#12494#12424
Half → 25K60349-289#12424#12713
25K → 30K231189-1166#12713#13879
30K → 20M23425-402#13879#14281
20M → 21M8565-557#14281#14838
21M → 35K1242+122#14838#14716
35K → 23M19392-373#14716#15089
23M → 24M41121-80#15089#15169
24M → 40K5173-22#15169#15191
40K → 25.2M18116-98#15191#15289
25.2M → Finish7452+22#15289#15267
TOTALS6885875-5187
📊

Passing Visuals

Category:
Loading...

🔄Passing Circle

Loading...

🌊Position Flow

Loading...

🏃Race Lanes

Loading...

Upload your GPX file

Supports Garmin, Apple Watch, Polar, Suunto, COROS, Strava, and other apps

.gpx files up to 10MB

Export Track Data

Download your race performance as a GPX or TCX file to import into Strava, Garmin Connect, or other fitness apps.

Questions or issues regarding timing data?

If you notice any discrepancies in your timing data or have questions about your results, our support team can help.

Contact Race Support

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing