Boston Marathon logo
BOSTON MARATHON 2023

Katherine Tolman

Bib: 26726•F

MA

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

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
32:09
Rank: #24350
Start → 5K
32:09 | 10:21/mi
10K· 6.21 mi
1:01:07
Rank: #23241 (+1109)
5K → 10K
28:58 | 9:19/mi
15K· 9.32 mi
1:30:03
Rank: #22757 (+484)
10K → 15K
28:56 | 9:19/mi
20K· 12.43 mi
1:57:53
Rank: #22063 (+694)
15K → 20K
27:50 | 8:58/mi
Half· 13.11 mi
2:03:58
Rank: #21960 (+103)
20K → Half
6:05 | 8:55/mi
25K· 15.53 mi
2:26:01
Rank: #21587 (+373)
Half → 25K
22:03 | 9:06/mi
30K· 18.64 mi
2:54:29
Rank: #21048 (+539)
25K → 30K
28:28 | 9:10/mi
20M
3:06:57
Rank: #20780 (+268)
30K → 20M
12:28 | 9:10/mi
21M
3:16:17
Rank: #20498 (+282)
20M → 21M
9:20 | 9:20/mi
35K· 21.75 mi
3:23:10
Rank: #20422 (+76)
21M → 35K
6:53 | 9:12/mi
23M
3:34:13
Rank: #20170 (+252)
35K → 23M
11:03 | 8:50/mi
24M
3:42:44
Rank: #19999 (+171)
23M → 24M
8:31 | 8:31/mi
40K· 24.85 mi
3:49:49
Rank: #19759 (+240)
24M → 40K
7:05 | 8:17/mi
25.2M
3:52:32
Rank: #19609 (+150)
40K → 25.2M
2:43 | 7:53/mi
Finish· 26.22 mi
3:59:20
Rank: #19194 (+415)
25.2M → Finish
6:48 | 6:40/mi

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
Distance13.11 mi
Time2:03:58
Pace9:27 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:55:22
Pace8:48 /mi
📊Negative Split: 6.9% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:49:0632:0910:2132:09
10:21
-
10K
6.21 mi12:18:041:01:079:5028:58
9:19
-1:02
15K
9.32 mi12:47:001:30:039:4028:56
9:19
0:00
20K
12.43 mi13:14:501:57:539:2927:50
8:58
-0:21
Half
13.11 mi13:20:552:03:589:276:05
8:55
-0:03
25K
15.53 mi13:42:582:26:019:2422:03
9:06
+0:11
30K
18.64 mi14:11:262:54:299:2228:28
9:10
+0:04
20M
20.00 mi14:23:543:06:579:2112:28
9:10
0:00
21M
21.00 mi14:33:143:16:179:219:20
9:20
+0:10
35K
21.75 mi14:40:073:23:109:216:53
9:12
-0:08
23M
23.00 mi14:51:103:34:139:1911:03
8:50
-0:22
24M
24.00 mi14:59:413:42:449:178:31
8:31
-0:19
40K
24.85 mi15:06:463:49:499:157:05
8:17
-0:14
25.2M
25.20 mi15:09:293:52:329:142:43
7:53
-0:24
Finish
26.22 mi15:16:173:59:209:086:48
6:40
-1:13

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

6:40 /mi

Average Pace

9:08 /mi

Slowest Pace

10:21 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

25:07

10% of race

Time at Steady Pace

3:02:04

76% of race

Time at Slower Pace

32:09

13% of race

Average Pace: 9:08 /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 mi11:49:0632:0910:2132:09
10:21
#24350
10K
6.21 mi12:18:041:01:079:5028:58
9:19
#23241
15K
9.32 mi12:47:001:30:039:4028:56
9:19
#22757
20K
12.43 mi13:14:501:57:539:2927:50
8:58
#22063
Half
13.11 mi13:20:552:03:589:276:05
8:55
#21960
25K
15.53 mi13:42:582:26:019:2422:03
9:06
#21587
30K
18.64 mi14:11:262:54:299:2228:28
9:10
#21048
20M
20.00 mi14:23:543:06:579:2112:28
9:10
#20780
21M
21.00 mi14:33:143:16:179:219:20
9:20
#20498
35K
21.75 mi14:40:073:23:109:216:53
9:12
#20422
23M
23.00 mi14:51:103:34:139:1911:03
8:50
#20170
24M
24.00 mi14:59:413:42:449:178:31
8:31
#19999
40K
24.85 mi15:06:463:49:499:157:05
8:17
#19759
25.2M
25.20 mi15:09:293:52:329:142:43
7:53
#19609
Finish
26.22 mi15:16:173:59:209:086:48
6:40
#19194
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi24350100671006721683(Top 81%)8603(Top 75%)8603(Top 176%)
10K6.21 mi3.10 mi23241+11099499+5689499+56822007(Top 83%)8819(Top 77%)8819(Top 181%)
15K9.32 mi3.11 mi22757+4849212+2879212+28721683(Top 81%)8603(Top 75%)8603(Top 176%)
20K12.43 mi3.11 mi22063+6948868+3448868+34419513(Top 73%)7388(Top 65%)7388(Top 151%)
Half13.11 mi0.68 mi21960+1038809+598809+5920075(Top 75%)7702(Top 67%)7702(Top 158%)
25K15.53 mi2.42 mi21587+3738593+2168593+21619400(Top 73%)7370(Top 65%)7370(Top 151%)
30K18.64 mi3.11 mi21048+5398309+2848309+28418003(Top 68%)6654(Top 58%)6654(Top 136%)
20M20.00 mi1.36 mi20780+2688162+1478162+14717450(Top 66%)6429(Top 56%)6429(Top 132%)
21M21.00 mi1.00 mi20498+2828031+1318031+13115215(Top 57%)5187(Top 45%)5187(Top 106%)
35K21.75 mi0.75 mi20422+767998+337998+3318766(Top 70%)7256(Top 64%)7256(Top 149%)
23M23.00 mi1.25 mi20170+2527868+1307868+13015161(Top 57%)5278(Top 46%)5278(Top 108%)
24M24.00 mi1.00 mi19999+1717771+977771+9714623(Top 55%)5045(Top 44%)5045(Top 103%)
40K24.85 mi0.85 mi19759+2407644+1277644+12711994(Top 45%)3684(Top 32%)3684(Top 75%)
25.2M25.20 mi0.35 mi19609+1507559+857559+855933(Top 22%)1064(Top 9%)1064(Top 22%)
Finish26.22 mi1.02 mi19194+4157322+2377322+2373406(Top 13%)355(Top 3%)355(Top 7%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 81%
×21stories
+97ft-345ft

Overall

21683

Females

8603

F18-39

8603

5K→10K

3.1 - 6.2 mi

Top 83%
×5stories
+79ft-138ft

Overall

22007

Females

8819

F18-39

8819

10K→15K

6.2 - 9.3 mi

Top 81%
×3stories
+67ft-78ft

Overall

21683

Females

8603

F18-39

8603

15K→20K

9.3 - 12.4 mi

Top 73%
×5stories
+106ft-86ft

Overall

19513

Females

7388

F18-39

7388

20K→Half

12.4 - 13.1 mi

Top 75%
×2stories
+19ft-37ft

Overall

20075

Females

7702

F18-39

7702

Half→25K

13.1 - 15.5 mi

Top 73%
×4stories
+66ft-88ft

Overall

19400

Females

7370

F18-39

7370

25K→30K

15.5 - 18.6 mi

Top 68%
×9stories
+181ft-148ft

Overall

18003

Females

6654

F18-39

6654

30K→20M

18.6 - 20.0 mi

Top 66%
×5stories
+64ft-50ft

Overall

17450

Females

6429

F18-39

6429

20M→21M

20.0 - 21.0 mi

Top 57%
×8stories
+106ft-24ft

Overall

15215

Females

5187

F18-39

5187

21M→35K

21.0 - 21.8 mi

Top 70%
×7stories
+17ft-86ft

Overall

18766

Females

7256

F18-39

7256

35K→23M

21.8 - 23.0 mi

Top 57%
×5stories
+23ft-63ft

Overall

15161

Females

5278

F18-39

5278

23M→24M

23.0 - 24.0 mi

Top 55%
×6stories
+12ft-82ft

Overall

14623

Females

5045

F18-39

5045

24M→40K

24.0 - 24.9 mi

Top 45%
×1story
+6ft-20ft

Overall

11994

Females

3684

F18-39

3684

40K→25.2M

24.9 - 25.2 mi

Top 22%
×1story
+13ft-16ft

Overall

5933

Females

1064

F18-39

1064

25.2M→Finish

25.2 - 26.2 mi

Top 13%
×2stories
+22ft-21ft

Overall

3406

Females

355

F18-39

355

Passing Analysis

Category:
Athletes Passed
5204
Passed By
48
Net Change
+5156
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#24350
5K → 10K11189+1109#24350#23241
10K → 15K50016+484#23241#22757
15K → 20K6951+694#22757#22063
20K → Half1052+103#22063#21960
Half → 25K3741+373#21960#21587
25K → 30K5423+539#21587#21048
30K → 20M2724+268#21048#20780
20M → 21M2820+282#20780#20498
21M → 35K859+76#20498#20422
35K → 23M2542+252#20422#20170
23M → 24M1721+171#20170#19999
24M → 40K2400+240#19999#19759
40K → 25.2M1500+150#19759#19609
25.2M → Finish4150+415#19609#19194
TOTALS520448+5156
📊

Passing Visuals

Category:
Loading...

🔥Passing Intensity

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