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BOSTON MARATHON 2023

Kelly Stolzmann

MA

Bib: 16857 F

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Top 40%
Gender (Female)
#0 / 11423
Top 22%
Masters (Masters Women)
#0 / 6539
Top 10%
Division (F40-44)
#0 / 1878
Top 20%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
469 ft elev
5K· 3.11 mi
7:58/mi
24:46
↑ 97↓ 3451.5%
220 ft elev
10K· 6.21 mi
7:51/mi
49:10
↑ 79↓ 1380.4%
157 ft elev
15K· 9.32 mi
7:47/mi
1:13:20
↑ 67↓ 78
146 ft elev
20K· 12.43 mi
7:47/mi
1:37:31
↑ 106↓ 860.1%
165 ft elev
Half· 13.11 mi
7:39/mi
1:42:44
↑ 19↓ 370.5%
148 ft elev
25K· 15.53 mi
7:49/mi
2:01:41
↑ 66↓ 880.2%
127 ft elev
30K· 18.64 mi
7:54/mi
2:26:13
↑ 181↓ 1480.2%
138 ft elev
20M
7:48/mi
2:36:49
↑ 64↓ 500.2%
148 ft elev
21M
8:22/mi
2:45:11
↑ 106↓ 241.6%
227 ft elev
35K· 21.75 mi
7:37/mi
2:50:53
↑ 17↓ 861.7%
156 ft elev
23M
7:56/mi
3:00:49
↑ 23↓ 630.6%
116 ft elev
24M
7:26/mi
3:08:15
↓ 821.3%
34 ft elev
40K· 24.85 mi
7:41/mi
3:14:49
↓ 200.3%
20 ft elev
25.2M
8:22/mi
3:17:42
↑ 13↓ 160.2%
18 ft elev
Finish· 26.22 mi
7:28/mi
3:25:19
↑ 22↓ 21
17 ft elev
Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent

The Course

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Half Splits

1st Half· via Half⚖️ Balanced
Distance13.11 mi
Time1:42:44
Pace7:50 /mi
2nd Half⚖️ Balanced
Distance13.11 mi
Time1:42:35
Pace7:50 /mi
📊Even Split: Consistent pacing between halves

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:20:4024:467:5824:46
7:58
-
10K
6.21 mi11:45:0449:107:5524:24
7:51
-0:07
15K
9.32 mi12:09:141:13:207:5224:10
7:47
-0:04
20K
12.43 mi12:33:251:37:317:5124:11
7:47
0:00
Half
13.11 mi12:38:381:42:447:505:13
7:39
-0:08
25K
15.53 mi12:57:352:01:417:5018:57
7:49
+0:10
30K
18.64 mi13:22:072:26:137:5124:32
7:54
+0:05
20M
20.00 mi13:32:432:36:497:5010:36
7:48
-0:06
21M
21.00 mi13:41:052:45:117:528:22
8:22
+0:34
35K
21.75 mi13:46:472:50:537:515:42
7:37
-0:45
23M
23.00 mi13:56:433:00:497:529:56
7:56
+0:19
24M
24.00 mi14:04:093:08:157:517:26
7:26
-0:30
40K
24.85 mi14:10:433:14:497:506:34
7:41
+0:15
25.2M
25.20 mi14:13:363:17:427:512:53
8:22
+0:41
Finish
26.22 mi14:21:133:25:197:507:37
7:28
-0:54

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

7:26 /mi

Average Pace

7:50 /mi

Slowest Pace

8:22 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:14:04

95% of race

Time at Steady Pace

11:15

5% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:50 /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 mi11:20:4024:467:5824:46
7:58
#13815
10K
6.21 mi11:45:0449:107:5524:24
7:51
#13685
15K
9.32 mi12:09:141:13:207:5224:10
7:47
#13308
20K
12.43 mi12:33:251:37:317:5124:11
7:47
#12820
Half
13.11 mi12:38:381:42:447:505:13
7:39
#12744
25K
15.53 mi12:57:352:01:417:5018:57
7:49
#12476
30K
18.64 mi13:22:072:26:137:5124:32
7:54
#11982
20M
20.00 mi13:32:432:36:497:5010:36
7:48
#11719
21M
21.00 mi13:41:052:45:117:528:22
8:22
#11567
35K
21.75 mi13:46:472:50:537:515:42
7:37
#11463
23M
23.00 mi13:56:433:00:497:529:56
7:56
#11312
24M
24.00 mi14:04:093:08:157:517:26
7:26
#11107
40K
24.85 mi14:10:433:14:497:506:34
7:41
#10946
25.2M
25.20 mi14:13:363:17:427:512:53
8:22
#10900
Finish
26.22 mi14:21:133:25:197:507:37
7:28
#10768
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF40-44Seg. OverallSeg. FemalesSeg. F40-44
5K3.11 mi3.11 mi138153903390312535(Top 47%)3202(Top 28%)3202(Top 171%)
10K6.21 mi3.10 mi13685+1303855+483855+4813595(Top 51%)3784(Top 33%)3784(Top 201%)
15K9.32 mi3.11 mi13308+3773634+2213634+22112535(Top 47%)3202(Top 28%)3202(Top 171%)
20K12.43 mi3.11 mi12820+4883374+2603374+26011611(Top 44%)2741(Top 24%)2741(Top 146%)
Half13.11 mi0.68 mi12744+763332+423332+4211457(Top 43%)2598(Top 23%)2598(Top 138%)
25K15.53 mi2.42 mi12476+2683216+1163216+11611237(Top 42%)2613(Top 23%)2613(Top 139%)
30K18.64 mi3.11 mi11982+4942965+2512965+25110127(Top 38%)2226(Top 19%)2226(Top 119%)
20M20.00 mi1.36 mi11719+2632834+1312834+1318902(Top 33%)1769(Top 15%)1769(Top 94%)
21M21.00 mi1.00 mi11567+1522769+652769+659671(Top 36%)2227(Top 19%)2227(Top 119%)
35K21.75 mi0.75 mi11463+1042726+432726+439447(Top 35%)2124(Top 19%)2124(Top 113%)
23M23.00 mi1.25 mi11312+1512666+602666+609333(Top 35%)2193(Top 19%)2193(Top 117%)
24M24.00 mi1.00 mi11107+2052580+862580+867310(Top 27%)1419(Top 12%)1419(Top 76%)
40K24.85 mi0.85 mi10946+1612525+552525+557889(Top 30%)1719(Top 15%)1719(Top 92%)
25.2M25.20 mi0.35 mi10900+462517+82517+88742(Top 33%)2145(Top 19%)2145(Top 114%)
Finish26.22 mi1.02 mi10768+1322481+362481+368400(Top 32%)2001(Top 18%)2001(Top 107%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 47%
×21story building
+97ft-345ft

Overall

12535

Females

3202

F40-44

3202

5K→10K

3.1 - 6.2 mi

Top 51%
×5story building
+79ft-138ft

Overall

13595

Females

3784

F40-44

3784

10K→15K

6.2 - 9.3 mi

Top 47%
×3story building
+67ft-78ft

Overall

12535

Females

3202

F40-44

3202

15K→20K

9.3 - 12.4 mi

Top 44%
×5story building
+106ft-86ft

Overall

11611

Females

2741

F40-44

2741

20K→Half

12.4 - 13.1 mi

Top 43%
×2story building
+19ft-37ft

Overall

11457

Females

2598

F40-44

2598

Half→25K

13.1 - 15.5 mi

Top 42%
×4story building
+66ft-88ft

Overall

11237

Females

2613

F40-44

2613

25K→30K

15.5 - 18.6 mi

Top 38%
×9story building
+181ft-148ft

Overall

10127

Females

2226

F40-44

2226

30K→20M

18.6 - 20.0 mi

Top 33%
×5story building
+64ft-50ft

Overall

8902

Females

1769

F40-44

1769

20M→21M

20.0 - 21.0 mi

Top 36%
×8story building
+106ft-24ft

Overall

9671

Females

2227

F40-44

2227

21M→35K

21.0 - 21.8 mi

Top 35%
×7story building
+17ft-86ft

Overall

9447

Females

2124

F40-44

2124

35K→23M

21.8 - 23.0 mi

Top 35%
×5story building
+23ft-63ft

Overall

9333

Females

2193

F40-44

2193

23M→24M

23.0 - 24.0 mi

Top 27%
×6story building
+12ft-82ft

Overall

7310

Females

1419

F40-44

1419

24M→40K

24.0 - 24.9 mi

Top 30%
×1story
+6ft-20ft

Overall

7889

Females

1719

F40-44

1719

40K→25.2M

24.9 - 25.2 mi

Top 33%
×1story
+13ft-16ft

Overall

8742

Females

2145

F40-44

2145

25.2M→Finish

25.2 - 26.2 mi

Top 32%
×2story building
+22ft-21ft

Overall

8400

Females

2001

F40-44

2001

Passing Analysis

Category:
Athletes Passed
3528
Passed By
481
Net Change
+3047
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#13815
5K → 10K371241+130#13815#13685
10K → 15K43558+377#13685#13308
15K → 20K50416+488#13308#12820
20K → Half859+76#12820#12744
Half → 25K29931+268#12744#12476
25K → 30K51218+494#12476#11982
30K → 20M2729+263#11982#11719
20M → 21M17018+152#11719#11567
21M → 35K1117+104#11567#11463
35K → 23M18837+151#11463#11312
23M → 24M2094+205#11312#11107
24M → 40K1676+161#11107#10946
40K → 25.2M5812+46#10946#10900
25.2M → Finish14715+132#10900#10768
TOTALS3528481+3047
📊

Passing Visuals

Category:
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🔄Passing Circle

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🌊Position Flow

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🏃Race Lanes

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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing