Boston Marathon logo
BOSTON MARATHON 2023

Stephanie Noll

Bib: 12279•F

TN

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 26622
Top 24%
Gender (Female)
#0 / 11423
Top 6%
Division (F18-39)
#0 / 4884
Top 12%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
22:55
Rank: #8654
Start → 5K
7:23/mi
22:55 split
10K· 6.21 mi
45:24
Rank: #8488 (+166)
5K → 10K
7:14/mi
22:29 split
15K· 9.32 mi
1:07:59
Rank: #8421 (+67)
10K → 15K
7:16/mi
22:35 split
20K· 12.43 mi
1:30:13
Rank: #7967 (+454)
15K → 20K
7:09/mi
22:14 split
Half· 13.11 mi
1:35:11
Rank: #7990 (-23)
20K → Half
7:17/mi
4:58 split
25K· 15.53 mi
1:52:45
Rank: #7779 (+211)
Half → 25K
7:15/mi
17:34 split
30K· 18.64 mi
2:15:31
Rank: #7422 (+357)
25K → 30K
7:20/mi
22:46 split
20M
2:25:29
Rank: #7273 (+149)
30K → 20M
7:20/mi
9:58 split
21M
2:33:04
Rank: #7112 (+161)
20M → 21M
7:35/mi
7:35 split
35K· 21.75 mi
2:38:14
Rank: #6994 (+118)
21M → 35K
6:54/mi
5:10 split
23M
2:47:23
Rank: #6851 (+143)
35K → 23M
7:18/mi
9:09 split
24M
2:54:29
Rank: #6756 (+95)
23M → 24M
7:06/mi
7:06 split
40K· 24.85 mi
3:00:34
Rank: #6622 (+134)
24M → 40K
7:07/mi
6:05 split
25.2M
3:03:11
Rank: #6568 (+54)
40K → 25.2M
7:35/mi
2:37 split
Finish· 26.22 mi
3:10:08
Rank: #6449 (+119)
25.2M → Finish
6:49/mi
6:57 split

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 Half⚖️ Balanced
Distance13.11 mi
Time1:35:11
Pace7:16 /mi
2nd Half⚖️ Balanced
Distance13.11 mi
Time1:34:57
Pace7:15 /mi
📊Even Split: Consistent pacing between halves

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:51:5422:557:2322:55
7:23
-
10K
6.21 mi11:14:2345:247:1822:29
7:14
-0:09
15K
9.32 mi11:36:581:07:597:1822:35
7:16
+0:02
20K
12.43 mi11:59:121:30:137:1622:14
7:09
-0:07
Half
13.11 mi12:04:101:35:117:164:58
7:17
+0:08
25K
15.53 mi12:21:441:52:457:1517:34
7:15
-0:02
30K
18.64 mi12:44:302:15:317:1622:46
7:20
+0:05
20M
20.00 mi12:54:282:25:297:169:58
7:20
0:00
21M
21.00 mi13:02:032:33:047:177:35
7:35
+0:15
35K
21.75 mi13:07:132:38:147:175:10
6:54
-0:41
23M
23.00 mi13:16:222:47:237:179:09
7:18
+0:24
24M
24.00 mi13:23:282:54:297:167:06
7:06
-0:12
40K
24.85 mi13:29:333:00:347:166:05
7:07
+0:01
25.2M
25.20 mi13:32:103:03:117:162:37
7:35
+0:28
Finish
26.22 mi13:39:073:10:087:156:57
6:49
-0:46

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

6:49 /mi

Average Pace

7:15 /mi

Slowest Pace

7:35 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:59:56

95% of race

Time at Steady Pace

10:12

5% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:15 /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 mi10:51:5422:557:2322:55
7:23
#8654
10K
6.21 mi11:14:2345:247:1822:29
7:14
#8488
15K
9.32 mi11:36:581:07:597:1822:35
7:16
#8421
20K
12.43 mi11:59:121:30:137:1622:14
7:09
#7967
Half
13.11 mi12:04:101:35:117:164:58
7:17
#7990
25K
15.53 mi12:21:441:52:457:1517:34
7:15
#7779
30K
18.64 mi12:44:302:15:317:1622:46
7:20
#7422
20M
20.00 mi12:54:282:25:297:169:58
7:20
#7273
21M
21.00 mi13:02:032:33:047:177:35
7:35
#7112
35K
21.75 mi13:07:132:38:147:175:10
6:54
#6994
23M
23.00 mi13:16:222:47:237:179:09
7:18
#6851
24M
24.00 mi13:23:282:54:297:167:06
7:06
#6756
40K
24.85 mi13:29:333:00:347:166:05
7:07
#6622
25.2M
25.20 mi13:32:103:03:117:162:37
7:35
#6568
Finish
26.22 mi13:39:073:10:087:156:57
6:49
#6449
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi8654125312538305(Top 31%)1177(Top 10%)1177(Top 24%)
10K6.21 mi3.10 mi8488+1661211+421211+428384(Top 31%)1186(Top 10%)1186(Top 24%)
15K9.32 mi3.11 mi8421+671184+271184+278305(Top 31%)1177(Top 10%)1177(Top 24%)
20K12.43 mi3.11 mi7967+4541041+1431041+1436851(Top 26%)743(Top 7%)743(Top 15%)
Half13.11 mi0.68 mi7990-231055-141055-148473(Top 32%)1252(Top 11%)1252(Top 26%)
25K15.53 mi2.42 mi7779+211997+58997+586934(Top 26%)818(Top 7%)818(Top 17%)
30K18.64 mi3.11 mi7422+357903+94903+946198(Top 23%)680(Top 6%)680(Top 14%)
20M20.00 mi1.36 mi7273+149868+35868+355851(Top 22%)666(Top 6%)666(Top 14%)
21M21.00 mi1.00 mi7112+161830+38830+385030(Top 19%)533(Top 5%)533(Top 11%)
35K21.75 mi0.75 mi6994+118805+25805+254868(Top 18%)484(Top 4%)484(Top 10%)
23M23.00 mi1.25 mi6851+143789+16789+165376(Top 20%)633(Top 6%)633(Top 13%)
24M24.00 mi1.00 mi6756+95782+7782+75225(Top 20%)634(Top 6%)634(Top 13%)
40K24.85 mi0.85 mi6622+134766+16766+164477(Top 17%)504(Top 4%)504(Top 10%)
25.2M25.20 mi0.35 mi6568+54753+13753+134401(Top 17%)556(Top 5%)556(Top 11%)
Finish26.22 mi1.02 mi6449+119729+24729+244225(Top 16%)511(Top 4%)511(Top 10%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 31%
×21story building
+97ft-345ft

Overall

8305

Females

1177

F18-39

1177

5K→10K

3.1 - 6.2 mi

Top 31%
×5story building
+79ft-138ft

Overall

8384

Females

1186

F18-39

1186

10K→15K

6.2 - 9.3 mi

Top 31%
×3story building
+67ft-78ft

Overall

8305

Females

1177

F18-39

1177

15K→20K

9.3 - 12.4 mi

Top 26%
×5story building
+106ft-86ft

Overall

6851

Females

743

F18-39

743

20K→Half

12.4 - 13.1 mi

Top 32%
×2story building
+19ft-37ft

Overall

8473

Females

1252

F18-39

1252

Half→25K

13.1 - 15.5 mi

Top 26%
×4story building
+66ft-88ft

Overall

6934

Females

818

F18-39

818

25K→30K

15.5 - 18.6 mi

Top 23%
×9story building
+181ft-148ft

Overall

6198

Females

680

F18-39

680

30K→20M

18.6 - 20.0 mi

Top 22%
×5story building
+64ft-50ft

Overall

5851

Females

666

F18-39

666

20M→21M

20.0 - 21.0 mi

Top 19%
×8story building
+106ft-24ft

Overall

5030

Females

533

F18-39

533

21M→35K

21.0 - 21.8 mi

Top 18%
×7story building
+17ft-86ft

Overall

4868

Females

484

F18-39

484

35K→23M

21.8 - 23.0 mi

Top 20%
×5story building
+23ft-63ft

Overall

5376

Females

633

F18-39

633

23M→24M

23.0 - 24.0 mi

Top 20%
×6story building
+12ft-82ft

Overall

5225

Females

634

F18-39

634

24M→40K

24.0 - 24.9 mi

Top 17%
×1story
+6ft-20ft

Overall

4477

Females

504

F18-39

504

40K→25.2M

24.9 - 25.2 mi

Top 17%
×1story
+13ft-16ft

Overall

4401

Females

556

F18-39

556

25.2M→Finish

25.2 - 26.2 mi

Top 16%
×2story building
+22ft-21ft

Overall

4225

Females

511

F18-39

511

Passing Analysis

Category:
Athletes Passed
2584
Passed By
379
Net Change
+2205
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#8654
5K → 10K329163+166#8654#8488
10K → 15K170103+67#8488#8421
15K → 20K4606+454#8421#7967
20K → Half1235-23#7967#7990
Half → 25K22413+211#7990#7779
25K → 30K36912+357#7779#7422
30K → 20M1545+149#7422#7273
20M → 21M1643+161#7273#7112
21M → 35K1213+118#7112#6994
35K → 23M1518+143#6994#6851
23M → 24M11015+95#6851#6756
24M → 40K1373+134#6756#6622
40K → 25.2M606+54#6622#6568
25.2M → Finish1234+119#6568#6449
TOTALS2584379+2205
📊

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
Share Feedback

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing