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BOSTON MARATHON 2023

Colleen Thundercliffe

Bib: 18699•F

0:00
0:00
/ mi
Masters
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Overall
#0 / 26622
Gender (Female)
#0 / 11423
Top 48%
Masters (Masters Women)
#0 / 6539
Top 37%
Division (F55-59)
#0 / 815
Top 14%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
25:22
Rank: #15202
Start → 5K
25:22 | 8:10/mi
10K· 6.21 mi
51:03
Rank: #15934 (-732)
5K → 10K
25:41 | 8:16/mi
15K· 9.32 mi
1:17:06
Rank: #16317 (-383)
10K → 15K
26:03 | 8:23/mi
20K· 12.43 mi
1:43:26
Rank: #16448 (-131)
15K → 20K
26:20 | 8:29/mi
Half· 13.11 mi
1:49:16
Rank: #16533 (-85)
20K → Half
5:50 | 8:33/mi
25K· 15.53 mi
2:09:56
Rank: #16506 (+27)
Half → 25K
20:40 | 8:31/mi
30K· 18.64 mi
2:37:25
Rank: #16439 (+67)
25K → 30K
27:29 | 8:51/mi
20M
2:49:30
Rank: #16377 (+62)
30K → 20M
12:05 | 8:54/mi
21M
2:58:54
Rank: #16308 (+69)
20M → 21M
9:24 | 9:24/mi
35K· 21.75 mi
3:05:13
Rank: #16255 (+53)
21M → 35K
6:19 | 8:27/mi
23M
3:16:07
Rank: #16125 (+130)
35K → 23M
10:54 | 8:42/mi
24M
3:24:37
Rank: #16038 (+87)
23M → 24M
8:30 | 8:30/mi
40K· 24.85 mi
3:32:11
Rank: #16001 (+37)
24M → 40K
7:34 | 8:51/mi
25.2M
3:35:24
Rank: #15966 (+35)
40K → 25.2M
3:13 | 9:20/mi
Finish· 26.22 mi
3:43:57
Rank: #15921 (+45)
25.2M → Finish
8:33 | 8:23/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:49:16
Pace8:20 /mi
2nd Half
Distance13.11 mi
Time1:54:41
Pace8:45 /mi
📊Positive Split: 5.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:24:5125:228:1025:22
8:10
-
10K
6.21 mi11:50:3251:038:1325:41
8:16
+0:06
15K
9.32 mi12:16:351:17:068:1626:03
8:23
+0:07
20K
12.43 mi12:42:551:43:268:1926:20
8:29
+0:06
Half
13.11 mi12:48:451:49:168:205:50
8:33
+0:04
25K
15.53 mi13:09:252:09:568:2220:40
8:31
-0:02
30K
18.64 mi13:36:542:37:258:2727:29
8:51
+0:20
20M
20.00 mi13:48:592:49:308:2812:05
8:54
+0:03
21M
21.00 mi13:58:232:58:548:319:24
9:24
+0:30
35K
21.75 mi14:04:423:05:138:316:19
8:27
-0:57
23M
23.00 mi14:15:363:16:078:3210:54
8:42
+0:15
24M
24.00 mi14:24:063:24:378:328:30
8:30
-0:12
40K
24.85 mi14:31:403:32:118:327:34
8:51
+0:21
25.2M
25.20 mi14:34:533:35:248:333:13
9:20
+0:29
Finish
26.22 mi14:43:263:43:578:338:33
8:23
-0:57

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

8:10 /mi

Average Pace

8:33 /mi

Slowest Pace

9:24 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:31:20

94% of race

Time at Steady Pace

12:37

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:32 /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 mi11:24:5125:228:1025:22
8:10
#15202
10K
6.21 mi11:50:3251:038:1325:41
8:16
#15934
15K
9.32 mi12:16:351:17:068:1626:03
8:23
#16317
20K
12.43 mi12:42:551:43:268:1926:20
8:29
#16448
Half
13.11 mi12:48:451:49:168:205:50
8:33
#16533
25K
15.53 mi13:09:252:09:568:2220:40
8:31
#16506
30K
18.64 mi13:36:542:37:258:2727:29
8:51
#16439
20M
20.00 mi13:48:592:49:308:2812:05
8:54
#16377
21M
21.00 mi13:58:232:58:548:319:24
9:24
#16308
35K
21.75 mi14:04:423:05:138:316:19
8:27
#16255
23M
23.00 mi14:15:363:16:078:3210:54
8:42
#16125
24M
24.00 mi14:24:063:24:378:328:30
8:30
#16038
40K
24.85 mi14:31:403:32:118:327:34
8:51
#16001
25.2M
25.20 mi14:34:533:35:248:333:13
9:20
#15966
Finish
26.22 mi14:43:263:43:578:338:33
8:23
#15921
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF55-59Seg. OverallSeg. FemalesSeg. F55-59
5K3.11 mi3.11 mi152024774477417056(Top 64%)5954(Top 52%)5954(Top 731%)
10K6.21 mi3.10 mi15934-7325247-4735247-47316702(Top 63%)5692(Top 50%)5692(Top 698%)
15K9.32 mi3.11 mi16317-3835478-2315478-23117056(Top 64%)5954(Top 52%)5954(Top 731%)
20K12.43 mi3.11 mi16448-1315573-955573-9516706(Top 63%)5759(Top 50%)5759(Top 707%)
Half13.11 mi0.68 mi16533-855635-625635-6217997(Top 68%)6461(Top 57%)6461(Top 793%)
25K15.53 mi2.42 mi16506+275643-85643-816357(Top 61%)5645(Top 49%)5645(Top 693%)
30K18.64 mi3.11 mi16439+675653-105653-1016358(Top 61%)5702(Top 50%)5702(Top 700%)
20M20.00 mi1.36 mi16377+625631+225631+2215979(Top 60%)5561(Top 49%)5561(Top 682%)
21M21.00 mi1.00 mi16308+695599+325599+3215492(Top 58%)5347(Top 47%)5347(Top 656%)
35K21.75 mi0.75 mi16255+535579+205579+2015014(Top 56%)5119(Top 45%)5119(Top 628%)
23M23.00 mi1.25 mi16125+1305524+555524+5514443(Top 54%)4880(Top 43%)4880(Top 599%)
24M24.00 mi1.00 mi16038+875489+355489+3514506(Top 54%)4963(Top 43%)4963(Top 609%)
40K24.85 mi0.85 mi16001+375478+115478+1115380(Top 58%)5512(Top 48%)5512(Top 676%)
25.2M25.20 mi0.35 mi15966+355465+135465+1314400(Top 54%)4970(Top 44%)4970(Top 610%)
Finish26.22 mi1.02 mi15921+455443+225443+2214707(Top 55%)5104(Top 45%)5104(Top 626%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 64%
×21stories
+97ft-345ft

Overall

17056

Females

5954

F55-59

5954

5K→10K

3.1 - 6.2 mi

Top 63%
×5stories
+79ft-138ft

Overall

16702

Females

5692

F55-59

5692

10K→15K

6.2 - 9.3 mi

Top 64%
×3stories
+67ft-78ft

Overall

17056

Females

5954

F55-59

5954

15K→20K

9.3 - 12.4 mi

Top 63%
×5stories
+106ft-86ft

Overall

16706

Females

5759

F55-59

5759

20K→Half

12.4 - 13.1 mi

Top 68%
×2stories
+19ft-37ft

Overall

17997

Females

6461

F55-59

6461

Half→25K

13.1 - 15.5 mi

Top 61%
×4stories
+66ft-88ft

Overall

16357

Females

5645

F55-59

5645

25K→30K

15.5 - 18.6 mi

Top 61%
×9stories
+181ft-148ft

Overall

16358

Females

5702

F55-59

5702

30K→20M

18.6 - 20.0 mi

Top 60%
×5stories
+64ft-50ft

Overall

15979

Females

5561

F55-59

5561

20M→21M

20.0 - 21.0 mi

Top 58%
×8stories
+106ft-24ft

Overall

15492

Females

5347

F55-59

5347

21M→35K

21.0 - 21.8 mi

Top 56%
×7stories
+17ft-86ft

Overall

15014

Females

5119

F55-59

5119

35K→23M

21.8 - 23.0 mi

Top 54%
×5stories
+23ft-63ft

Overall

14443

Females

4880

F55-59

4880

23M→24M

23.0 - 24.0 mi

Top 54%
×6stories
+12ft-82ft

Overall

14506

Females

4963

F55-59

4963

24M→40K

24.0 - 24.9 mi

Top 58%
×1story
+6ft-20ft

Overall

15380

Females

5512

F55-59

5512

40K→25.2M

24.9 - 25.2 mi

Top 54%
×1story
+13ft-16ft

Overall

14400

Females

4970

F55-59

4970

25.2M→Finish

25.2 - 26.2 mi

Top 55%
×2stories
+22ft-21ft

Overall

14707

Females

5104

F55-59

5104

Passing Analysis

Category:
Athletes Passed
1406
Passed By
2125
Net Change
-719
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#15202
5K → 10K84816-732#15202#15934
10K → 15K79462-383#15934#16317
15K → 20K115246-131#16317#16448
20K → Half1499-85#16448#16533
Half → 25K146119+27#16533#16506
25K → 30K214147+67#16506#16439
30K → 20M10947+62#16439#16377
20M → 21M10637+69#16377#16308
21M → 35K7724+53#16308#16255
35K → 23M15727+130#16255#16125
23M → 24M10720+87#16125#16038
24M → 40K7134+37#16038#16001
40K → 25.2M4813+35#16001#15966
25.2M → Finish7934+45#15966#15921
TOTALS14062125-719
📊

Passing Visuals

Category:
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🔥Passing Intensity

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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